Q: How does knowing an addition fact help with a subtraction fact?

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By utilising the fact that subtraction is the reverse operation to addition. Thus, if A + B = C then C - B = A In this particular case, since 125 + 150 = 275 then 275 - 150 = 125

the whole reason is this: multiplication is adding to that number in groups and division is subtracting from a number in groups.

I need help, Please help me and others out

I need help with that. I happen to have that question now in my Math lesson :( HELP!!!

Ok i can see where you would have trouble with this. When i first started Algebra, i wasn't quite sure how this worked. Here are some examples: 2-+2=0 the subtraction sign cancels the addition out. (2-2 is the same thing) 2- -2= 4 the two subtraction signs make an addition sign. (2+2 is the same thing) I hope i could help you.

It can help SOME people to understand it better - though others find it makes things more confusing. So it is NOT universally better.

The answer to this question is 12. This is a math question that uses multiplication, subtraction, addition and division.

The four maths you need to learn the most are addition,subtraction,multiplication and division. You need to learn this because it will help you understand the othe parts in maths.

Please Exuse My Dear Aunt Sally Parentheses Exponents Multiplication or Addition or Subtraction. “PEMDAS” (parenthesis, exponents, multiplication, division, addition, subtraction) to help you remember? Memorable acronyms aren't the only way to memorize concepts.

Knowing the least common multiple of the denominators will help you find a common denominator when adding and subtracting unlike fractions. Knowing the greatest common factor of the numerator and the denominator will help you reduce the fraction if possible.

Pemdas means a key that will help you in order of operations. It means : Parentheses Exponents Multiplication Division Addition Subtraction You can memorize it by: Please Excuse My Dear Aunt Sally

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