Which answer is the best explanation for how to check to see that the difference has been calculated correctly for this problem?

76.5 - 4.32 = 72.18

A.

Add the first and second numbers to get the difference.

B.

Add the difference to the second number to get the first number.

C.

Subtract the second number from the difference to get the first number.

D.

Add the first number and the difference to get the second number.

Question

Aidan Stevenson

Mathematics

20 August, 21:27

Which answer is the best explanation for how to check to see that the difference has been calculated correctly for this problem?

76.5 - 4.32 = 72.18

A.

Add the first and second numbers to get the difference.

B.

Add the difference to the second number to get the first number.

C.

Subtract the second number from the difference to get the first number.

D.

Add the first number and the difference to get the second number.

+4

Answers (1)

Know the Answer?

Karlie · Answer 1

A. No, because if you add 76.5 and 4.32, you'll get 80.82 instead of 72.18.

B. Yes, because if you add 72.18 and 4.32 you'll get 76.5

C. No, because if you substract 4.32 from 72.18, you'll get 67.86 instead of 76.5.

D. No, because if you add 76.5 and 72.18, you'll get 144.65 instead of 4.32.

Correct answer: B