# ✅✅Ley De Signos Suma, Resta, Multiplicación y División 2019-🤣😅Matemáticas

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Hello friends here again on your channel TESLA WORLD MATH today we are going to see a topic called the LAW OF SIGNS in an easy way but I want to clarify that this topic is very important unfortunately in many educational institutions pass it very fast in class, this topic is so important because it will affect a lot in the subjects later as equations also in physics topics in trigonometry so we're going to develop in a way well specific so you guys can easily understand how to solve this type of exercises so that more Go ahead make no mistake in these operations addition or subtraction, let's start. What they have to do is the following when they have SAME SIGNS !!! THEY HAVE TO ADD THE TERMS yes we have DIFFERENT SIGNS WE SUBTRACTED !! and the answer will always be the sign of the greater number for example as we have
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this expression that we are going to develop here, we will be practical and we will put examples once if we have minus 5 and we add plus 3 let's say we have well the first thing they have to do is the sign of the largest number let's say as here we have 5 and here we have 3 the largest number would be 5 the 5 has a negative sign so the answer as it says here answer sign, the greater number the answer will be the higher the number going to be negative is the first thing they have to do secondly always remember this rule equal signs are added and signs different are subtracted here we see that 5 has a negative sign and 3 has a positive sign remember that the sign is always to the left of the number then as the signs are different as you can see here we have to subtract as it says here 5 minus 3 is 2
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and that would be the answer. Let's do another example let's say we have let's say we have minus 2 minus 5 again we say the largest number what sign does it have, what is 5 and does it have a sign negative then the answer will negative and now we remember our law up here the law of signs, signs the same are added and as we see here the 2 it has a negative sign and the 5 also it also has a negative sign so how are they the two equals have to add 5 plus 2 is seven and that would be the answer. one more example if we have + 2 let's say minus 3 once again we say the largest number which would be 3 has the negative sign then the answer will be negative and as they are different signs according to the law of signs have to be subtracted 3 - 2 us
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give 1 and that would be the answer. This is the more practical way to develop exercises with sign law apparently this is simple but at as this progresses it complicates and let's say it is not complicated but we have to be more careful with exercises let's say we can have this way minus 3 plus 5 minus 8 how would we solve this exercise I recommend that you do it in pairs first we solve them two and we apply what we have already learned the largest number of these two would be the 5 and 5 have a positive sign first we analyze the sign, the answer is going to be positive and now the 5 has positive sign, 3 has negative sign as they are different signs we have to subtracting them, 5 minus three gives us 2 and now if it just drops 8, minus 8
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and again we say of them two the largest number would be 8 and this 8 has a negative sign so the answer would be negative and like 8 has a negative sign and he 2 has a sign positive, different signs are subtracted, 8 minus 2 and We would have 6 and that would be the answer. Now we are going to use another example, well here we will do another example let's say that we have 3 plus 7 minus 10 minus 15 then again as I said does a moment we do two by two we solve them both and they two remember the following, FIRST YOU HAVE WHAT TO SEE THE SIGNS now ALL THE NUMBERS HAVE SIGN EXCEPT FOR 0 remember that, all the real numbers have a sign and are on the left when you don't see the sign i assume that you already know but for those who don't know what
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I always say when you don't see the sign, YOU KNOW YOU ARE POSITIVE is here up but normally it doesn't get but when you don't see the sign, it's positive. So having said that we say, the bigger number of the two is 7 and it has the positive sign that means that the answer will be positive and then we say remembering the law of signs, equal numbers sorry numbers with equal signs because they are both positives have to be added 3 + 7 gives us 10 that's it now we grab both again the largest number would be the 15 and has a negative sign then the answer is going to be negative and since they are equal signs by the law of signs when you have two signed numbers you have to add 10 + 15 gives us 25 we are solving step by step, now we would have plus 10 - 25 again we put the two together and we see, the sign first the sign always
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the larger number of the two is 25, which sign has 25, negative then we put negative and finally remembering the law of signs we say 25 negative sign 10 has sign positive different signs according to the law of signs have to be subtracted, 25 minus 10 it gives us 15 and it would be solved now let's do another example for you to see that we make a variety of problems here on your channel math tesla world. Let's say we have this which is already more different look at minus 2,343 plus 1,132 let's say this is a little bit different how you guys can see but the idea of ​​it not only works with small numbers too with large numbers, of the amount of figures that you want, what we have to see here first which is, as we said, the sign that has the largest number we have 1132 here for the right and we have 2343 on the left
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obviously this number it is bigger how can you tell and what is the number bigger than sign it has, negative already we know the answer will come out negative now what are we going to do since there are two numbers this has a sign negative and he has a positive sign according to the law of signs we have to subtract them then we just do here let's say a parentheses and we subtract as we know 2,343 minus 1,132 and we subtract as we have taught 3 - 2 gives us 1.4 minus 3 gives us 1.3 minus 1 gives us 2 and 2 minus 1 gives us 1. this is the answer but finally we say but there is the answer but with the sign negative that we had cleared up first would be -1,211 that would be the answer for
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this example now we go with another example well friends following the law of signs now let's see how it works the law of signs for multiplication and division is different, here as a general rule we are putting what is the law of signs when they have positive for positive we positive, remember I'm putting the point in between the parentheses for to indicate that it is a product but normally you don't get you guys always that they see parentheses they already have to know that this is a product is fine then we come back, more for more or positive sign for positive sign gives us a positive sign negative sign for another negative sign it gives us positive as you can see here you in these two if the signs are the same, I clarify in the product, we are not speaking of addition or subtraction, if the signs the product is the same answer is positive never forget those equal signs in
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product or division is the same let's say for the signs they give us positive and if multiply positive sign by sign negative gives us negative again if we multiply a negative sign by a positive sign gives us negative, What is the conclusion, DIFFERENT SIGNS IN PRODUCT OR DIVISION GIVES US NEGATIVE !!!! in the order that they are plus x minus or less for more gives us negative once again I tell you equal signs in product or division throws us a positive sign different signs in multiplication and division gives us negative sign let's make an example, all by example here on your channel. I take this opportunity to tell you that DON'T FORGET TO SUBSCRIBE, GIVE US A LIKE TO KEEP GROWING, SHARE IT ON YOUR SOCIAL NETWORKS with his friends with his classmates study. The first that let's do what they have to do is you MULTIPLY THE SIGNS and forget us
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of the numbers for a moment signs first always signs first, we say negative sign by sign negative gives us positive, once you have operated the signs already they forget the signs and just operate 3 for 2 gives us 6 remember that this expression can come also in this way -3 parentheses -2, we do all variations so you guys don't have any questions on your exam because according to the teacher it is that they enunciate the exercise to you, you have to know that it can be placed with a point which means product like a parenthesis or failing as it was done formerly with the sign for, which was a x small. So in all three ways they have to know the same sign by sign remember that here is a product whenever they see parentheses is a product less for less again gives us more and 3 times 2 gives us 6 and finally here
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the same will come out true less for less gives us more and 3 times 2 gives us 6, as I say again depends on the teacher who wherever they are because this works for everyone in the way of how you are going to express it either with point with parentheses or as the old way but it is valid with the small x meaning by. We do another example let's say we have -4 by 3 how do we solve this like we said formerly FIRST SIGNS always remember that when a number it has no sign is not that it has but which is the positive that is known to be there I didn't say we're not saying it Suppose you know the sign is there, then we follow the signs first as we have learned less for more we give less and finally 4 x 3 gives us 12. Ready another example, now of division let's say we have 8
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between -2 how would we do this, how would we do it too with multiplication by the rule applies to both multiplication and division, first signs this 8 as no sign apparently you know which is positive, as I say I never know puts but you know there is a sign, the sign always goes to the left side never forget the number, so we say more the less the less it gives us and now if 8 between 2 gives us 4, in the division it can also appear in this way 8 two points -2 it is also valid as well as the multiplication in division also there are several ways to express agreement where you are or the teacher 8 minus 2 one more time we say the same the 8 has the sign positive that you don't see more the less gives us less and 8 between two gives us 4 and it can also be this way 8 over minus two this also indicates a
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division the fraction line also indicates a division we do the same the 8 has the positive sign here and we say more the less gives us the less by the law of signs and 8 between 2 gives us 4.Les we are presenting here all the ways you can file a division and all the ways that you can present a multiplication for that you have no doubt. Ready, now let's move on to another example. For example let's say we have a product of four numbers each each who with their signs as you know and they I repeat all the numbers have a sign except the zero which is neutral, then the easiest way to do it Let's say it is step by step, I will explain it step by step but whoever can do it directly does it, no problem we grab two by two and we say first the signs as we have already said less for less gives us more and 3 for 2 gives us 6, ready now here
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- by the sign of 4 you already know what it is positive but not seen - no matter how gives less and 2 times 4 gives us 8, we proceed here again first the plus signs for less gives us minus 6 times 8 gives us 48 and it would be the answer and if you guys are a little bit faster just say, so too they can do it this way. signs first of all the numbers and they say less for less gives us more, that more for this less gives us less and that less for this more we give less and finally it says 3 times 2 is 6, 6 times 2 is 12 and 12 times 4 gives us 48. As we found a moment ago the same answer will come out the way you solve.
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well now we continue with this exercise it would already be a combined exercise we have a product above, division and product below, before I want to ask all SUBSCRIBE, HELP GROW THIS NEW CHANNEL called Tesla World Math where are we going to learn everything physics math science chemistry and after this problem we go to do one more problem so they can see where is the students wrong because you can say no of course - 2 - 3 easy gives us less 5 is easy of course it's easy I tell them but at the time of the exam by changing certain things students are wrong and that's what I I am going to show you today where are they going to go wrong or where you don't have to make a mistake so they get graceful out of their exam so stay until the end of the video so they learn what they are the tricks, what are the mistakes that they should not commit, now we will solve this exercise -3 by -4 by 2 we are going to solve them first to do it step by step first the two of them, and we say how we have already learned first the minus signs for less gives us more, 3 x 4 gives us 12 ready for 2 says true
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we are putting it the same and down I have not done nothing we're still not going to leave same to do step by step so that nobody complicate me again we say now we have two already we have reduced exercise again more for don't forget you don't see the sign but you know there is a positive here always remember that and we say more for more it gives us more, 12 for 2 it gives us 24 and down as it would be again first the minus signs for less gives us more 2 for 6 gives us 12 very well so far, now we have a simple division another first time the plus signs the more we gives more 24 between 12 gives us 2 and this would be the students answer as I say this seems simple is
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simple actually now let's see let's say a more complicated exercise, where is it that people make mistakes the students well friends then now if it comes good of this topic, the part let's say most important of this topic as already we have learned -3 minus 2 easy does not give us less 5 now let's look at a variation on this expression so they see where it many students make mistakes throughout The years I've seen are wrong always the same i hope you guys already not after watching this video, let's say we have three plus two this obviously for many it's easy it gives us 5 we could also have 3 minus 2 this gives us 1 we can also have 2 minus 3 and this gives us ..... and many people tell me that this is minus 6 and I have to tell you is that this IS WRONG !!!! because it's wrong obviously they have already
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realized but a lot of people what he does already says this, 2 minus 3 says more for less is less and 2 for 3 gives us 6 and here is the error friends here is the eye mistake with this It will seem simple to you but it happens a lot in the exam so I tell you WHILE YOU DON'T SEE BETWEEN THESE TWO NUMBERS OF MULTIPLICATION, ... do not apply the multiplication sign law don't do it here you just have 2 minus 3 you have to apply the law of but to teach you to add or subtract, what do you want say that 2 - 3 if you don't see here multiplication or division DO NOT SEE A POINT, DO NOT SEE AN x, DO NOT SEE A PARENTHESIS you just have to apply sum or subtract what you say, the 2 has the sign positive and the 3 has a negative sign the bigger number that sign has negative and as they are different signs by signs they have to subtract 3 - 2
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the amount of times students are wrong about this I will continue making variations less 2 minus 3 this is minus 5, clarify -5 many people make this mistake - 2 - 3 and they tell me 6 and this is also BAD !!! multiply less by less it gives me more and on top they clarify the more and 2 times 3 is 6, BEWARE !!! also with this gentlemen BEWARE !!!, I tell you again so you don't know I forgot you while you don't see between these two numbers a multiplication one division one parentheses or a point, this is sum or subtraction is nothing else the only thing they have what to do is see the sign of the number greater in this case is 3 to be the negative answer and see if they are signs the same or are different signs, if they are equal signs have to be added
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3 plus 2 gives us 5 as you see is the answer and if they were different signs they have to subtract it, no make that mistake of multiplying or divide when it is an addition or a subtraction then friends by way of review 90 let's say a summary of everything we've viewed and keep that in mind for when you go to reviewing 4 plus 6 gives us 10, equal signs are have to add and the sign of the major plus 10 attentive !! 4 - 6, as I do not see that there is a multiplication applied the addition and subtraction the largest number has a sign negative so the answer is negative and as a different sign we have that subtracting 6 minus 4 gives us 2 Now 6 minus 4.6 minus 4 as I don't see ATTENTION !!! with what I say, as I see no sign of multiplication and division between them two I just have to apply addition or subtraction
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remember that 6 has a sign positive here and we say the most number big in this case is 6 has sign positive then the answer is positive and as they are different sign it they have to subtract 6 minus 4 gives us 2 we are still here 6 by -4 here is different, ATTENTION !!! these two look this is a SUBTRACT and this is a PRODUCT here's the difference, so here's how we work as a product applied the product sign law, he has a positive sign you know and we apply more x less gives us less, 6 times 4 gives us 24 ATTENTION with these answers one thing is to subtract or add and another thing is to multiply, if we have minus -6 by -4 again we have a product we apply the product sign law minus per
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less gives us more 6 times 4 gives us 24, if we have minus 6 minus 4 ATTENTION !!!! here NOT A PRODUCT you don't also no product factor here simply add or subtract then we apply the sign law for addition and subtraction The largest number who is 6 which sign has negative I put the negative and since they are equal signs I have to add 6 plus 4 gives us 10 truth and ending here we can say also minus 6 minus 4 a which is equal is a division we apply sign law for the division minus between less gives me more and 6 between 4, we leave 6 between 4 or you can also remove half and half it gives us 3 more means, what I want see what the VARIATION is I am working only with 6 and with 4 look here what throughout this exercise I work for
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6 and with 4 in all variations of your signs to SEE the answers DIFFERENT that each operation provides so that they are not mistaken so for final recommendation when go solve an exercise like this theme what has to be first look here look at the middle of the numbers if it's that there is a multiplication factor or division if there is that factor of multiplication or division, just apply the law of signs for addition or subtraction all they have to do is see who is the largest number and they put your signs of the largest number and if are different signs in this case we we have to subtract 5 minus 3 equal to 2 and outside equal signs we have to add it again the last example here to go now, DON'T FORGET TO SUBSCRIBE FRIENDS LEAVE US HANDS UP to continue growing our Math World Tesla channel share your social networks or facebook on its pages everywhere where can so that everyone can learn. this case the first thing I have to see
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is that as I see here that there is a sign of multiplication I apply my MULTIPLICATION SIGNS LAW here is less for more gives us less 3 times 5 gives us 15 and that would be everything. Well friends I think that with all this that we have developed remains of course THE LAW OF SIGNS for all of you if they are not going to make a mistake constantly review these exercises at home so they have it very clear and these are not going to be wrong exams thank you very much and see you soon