Question

How is using addition to check an answer to a subtraction problem different than using estimation

Answer 1

Using addition allows you to check the accuracy of a subtraction problem by adding the difference back to the subtrahend, while estimation involves rounding the numbers to make the calculation easier.

Step-by-step explanation:

Using addition to check an answer to a subtraction problem involves adding the difference to the subtrahend to see if it equals the minuend. For example, if you have the subtraction problem 9 - 5 = 4, you can use addition to check by adding 5 to 4, which equals 9, the original minuend.

On the other hand, using estimation involves rounding the numbers involved in the subtraction problem to make the calculation easier. For example, if you have the subtraction problem 346 - 128, you can estimate by rounding 346 to 350 and 128 to 130. Then, subtracting 130 from 350 gives you an estimated answer of 220, which provides a rough approximation of the actual answer.

Answer 2

using addition to check a subtraction equation is different than estimation is different because addition allows for your answer to be correct