Commutative Law of Addition. Created by Sal Khan and Monterey Institute for Technology and Education.
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- but in my school i learned it a different way isn't it actually going to be what ever calculation you have for example: 2 times 4 and i know the answer is :8 so when we swap the number it becomes 4 times 2 and so my answer: is 8 so when we swap the numbers around its going to be the same answer(8 votes)
- Why is there no law for subtraction and division?(5 votes)
- The properties don't work for subtraction and division.
For example: 7 -2 is not the same as 2 - 7, so commutative property does not work for subtraction.
AND, 8 / 2 is not the same as 2 / 8, so commutative property does not work for division.(7 votes)
- is there any other law of addition(3 votes)
- what is 5+5+9 and 9+5+5
and 5+9+5(4 votes)
- Are laws and properties the same thing?(1 vote)
- Laws are things that are acknowledged and used worldwide to understand math better. Properties are qualities or traits that numbers have. For example, the commutative law says that you can rearrange addition-only or multiplication-only problems and still get the same answer, but the commutative property is a quality that numbers and addition or multiplication problems have.(5 votes)
- hello - can anyone explain why my child's approach is wrong?
3 - (-8) - 3 = ?
3 + 3 = 6 - 8 = -2
(answer should be 8)(2 votes)
- Notice in the original problem, the 2nd 3 has a minus in front of it. But, the minus was changed to a plus when the 3's were combined. You need to keep the minus sign on the 2nd 3.
3-3 = 0
You then have 0 -(-8) = 0 + 8 = 8
Hope this helps.(1 vote)
- What's the difference between the associative law and the commutative law?(2 votes)
- They are basically the same except that the associative property uses parentheses. Since the purpose of parentheses in an equation is to signal a certain order, it is basically true because of the commutative property.(1 vote)
- what is the code for google classroom?(1 vote)
- Khan Academy does not provide any code. Your teacher may provide you with the code only if your school uses Khan Academy. If your school doesn't use Khan Academy, no code is there for you.(2 votes)
- This video is for grade 9 people right?(1 vote)
- No, it is meant for Pre-Algebra, or about middle school grade (6-8). It may still be in higher grade math as a refresher of what you've learned.(2 votes)
- At1:20what do you mean(1 vote)
- i guess it means no matter in what order the problem it is, the answer will be the same. i hope this helps(1 vote)
Use the commutative law of addition-- let me underline that-- the commutative law of addition to write the expression 5 plus 8 plus 5 in a different way and then find the sum. Now, this commutative law of addition sounds like a very fancy thing, but all it means is if you're just adding a bunch of numbers, it doesn't matter what order you add the numbers in. So we could add it as 5 plus 8 plus 5. We could order it as 5 plus 5 plus 8. We could order it 8 plus 5 plus 5. These are all going to add up to the same things, and it makes sense. If I have 5 of something and then I add 8 more and then I add 5 more, I'm going to get the same thing as if I had took 5 of something, then added the 5, then added the 8. You could try all of these out. You'll get the same thing. Now, they say in a different way, and then find the sum. The easiest one to find the sum of-- actually, let's do all of them. But the easiest one, just because a lot of people immediately know that 5 plus 5 is 10, is to maybe start with the 5 plus 5. So if you have 5 plus 5, that's 10, plus 8 is equal to 18. Now, let's verify that these two are the same exact thing. Up here, 5 plus 8 is 13. 13 plus 5 is also 18. That is also 18. If we go down here, 8 plus 5 is 13. 13 plus 5 is also equal to 18. So no matter how you do it and no matter what order you do it in-- and that's the commutative law of addition. It sounds very fancy, but it just means that order doesn't matter if you're adding a bunch of things.