a + b = c
To check if c is correct, subtract by either a or b , and you should get b and a respectively:
a = c - b
b = c - a
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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.
Add the result to the number you were subtracting; if this equals the original number then the subtraction is likely to be correct. example: if you calculated 123 - 56 and get the result 67, check by working out 67 + 56 and see if you get 123.
who invented subtraction?
read the value A,b store the result of subtraction of a,b in continer subtraction display subtraction
It depends whether it is a subtraction, mulitplication, addition, or division problem.