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What does regrouping mean in subtraction?
It means the Same thing as borrowing.
Why does associative property does not work with subtraction?
Associative property does not work with subtraction because not all numbers can be subtracted and have the same results............
What are the 4 basic operations of arithmetic?
The 4 basic arithmetic operations are addition, multiplication, division, and subtraction. subtraction is the inverse (opposite) of addition the same way around and the same concept as division and multiplication.
Why when subtracting a negative number must you change the subtraction sign to an addition sign?
Because a negative negative is the same a a positive, and because of the definition of subtraction and addition.
Are subtraction and division commutative and associative?
Subtraction is commutative... in a way. You can convert any subtraction to an addition. 7 - 2 is NOT the same as 2 - 7. However, when turning the terms around, you may keep the sign, so that 7 - 2 is the same as -2 + 7. This is justified by the commutative law of addition. Similarly with division: 10 / 2 is not the same as 2 / 10, but you can convert 10 / 2 into (1/2) x 10.
