Question

Which of these examples is an error of addition by one?

A. 46,371 + 32,618 = 78,989
B. 38,273 + 51,425 = 89,798
C. 13,246 + 84,631 = 97,877
D. 52,634 + 25,145 = 77,779

Answer 1

Your answer will be B the reason is because 38,273+51,425=89698

Answer 2

Answer: B. 38,273 + 51,425 = 89,798

Explanation:

Let's check all the sum by adding their corresponding places.

A.
`46,371 + 32,618 = 78,989`

Its correct.

B.
`38,273 + 51,425 =89698\\eq 89,798`

Here when we add the digits on the hundredth place we get 6 not 7.

Hence, it is the example of an error of addition by one.

Its correct.

C.
`13,246 + 84,631 = 97,877`

Its correct.

D.
`52,634 + 25,145 = 77,779`

Its correct.