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

A. [tex]35,427 + 63,562 = 98,989[/tex]

B. [tex]17,642 + 72,345 = 89,987[/tex]

C. [tex]43,724 + 54,263 = 97,987[/tex]

D. [tex]28,546 + 61,352 = 89,898[/tex]



Answer :

To determine which example is an error in addition, we should verify the correctness of each provided addition statement. We will compare the sum from each statement to ensure they match.

To do so, let's review the given examples and see which sums match their provided results:

1. Example A:
- Given: [tex]\(35,427 + 63,562 = 98,889\)[/tex]
- The comparison results show that [tex]\(35,427 + 63,562\)[/tex] does not equal [tex]\(98,889\)[/tex].

2. Example B:
- Given: [tex]\(17,642 + 72,345 = 89,987\)[/tex]
- The comparison results show that [tex]\(17,642 + 72,345\)[/tex] equals [tex]\(89,987\)[/tex].

3. Example C:
- Given: [tex]\(43,724 + 54,263 = 97,987\)[/tex]
- The comparison results show that [tex]\(43,724 + 54,263\)[/tex] equals [tex]\(97,987\)[/tex].

4. Example D:
- Given: [tex]\(28,546 + 61,352 = 89,898\)[/tex]
- The comparison results show that [tex]\(28,546 + 61,352\)[/tex] equals [tex]\(89,898\)[/tex].

Based on the provided true results for the addition checks:
- Example A is the only one that does not match, indicating an error in the sum.

Therefore, the example that features an error of addition is:
A. [tex]\(35,427 + 63,562 = 98,889\)[/tex].