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to ensure and re-check your work you use the opposite signs (addition & subtractions, multiplication & division)

e.g.

__= blank

10+ _ = 12

_=2

to check: you take the answer (in this case 12) and subtract (because its the opposite of addition) by the blank you filled in (2 in this case.

therefore, 12-2=10 so we know its correct :-)

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Q: Why do you check addition with subtraction?
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Related questions

How do you check addition with division?

You don't. You can check addition with subtraction or subtraction with addition, since subtraction is the opposite of addition. Similary, you can check division with multiplication, or vice versa.


What type of addition is used to check addition?

Subtraction is used to check addition.


Why can you use addition to check your subtraction?

Addition is the opposite of subtraction. For example, 24 - 9 = 15. If you want to check your answer, add 9 + 15. It equals 24, so your answer is correct.


Who discovered addition or subtraction?

who discovered addition and subtraction.


Definition of addition and subtraction of binary?

definiton of addition and subtraction


How addition and subtraction related?

Addition and subtraction are reverse operations.


How is addition relaked to subtraction?

Addition is the inverse operation to subtraction.


How are addition and subtraction of integers related?

Addition and subtraction are inverse functions.


What are the similarities of addition and subtraction?

Subtraction can be seen as the inverse operation to addition.


How are addition and subtraction mathematically connected?

Subtraction is the addition of a negative number.


How are addition and subtraction the same?

Addition is a sum and so is subtraction. So there's your answer!


How do you check your answers in addition and subtraction?

for addition you take the sum and subtract one of the numbers being added from it and for subtraction you add the difference with the second number being subtracted so it equals the first number