Question

check the following addition. if the answer is incorrect, find the correct answer.
7 8
278
225
+ 285
778

select the correct choice below and, if necessary, fill the answer box to complete your choice.
a. the answer 778 is correct because re - adding from bottom to top gives the same answer.
b. the answer 778 is incorrect because re - adding from bottom to top gives the correct answer 866.

Explanation:

Step1: Add the numbers correctly

We need to add \(78 + 278+225 + 285\). First, add \(78+278 = 356\). Then, add \(356+225=581\). Then, add \(581 + 285=866\).

Step2: Compare with the given answer

The given answer is \(778\), which is incorrect. The correct sum is \(866\).

Answer:

B. The answer 778 is incorrect because re - adding from bottom to top gives the correct answer 866.