Question

1
zain:
\

$$\begin{array}{r} 5.36 \\ +14.12 \\ \\hline 67.72 \\end{array}$$

willow:
\

$$\begin{array}{r} 5.36 \\ +14.12 \\ \\hline 19.48 \\end{array}$$

2
what did the person you did not choose do incorrectly?

Explanation:

Step1: Identify the correct addition

First, we calculate the correct sum of \(5.36 + 14.12\). When adding decimals, we align the decimal points:
\[

$$\begin{align*} &\ \ 5.36\\ +&14.12\\ \hline &19.48 \end{align*}$$

\]
So Willow's calculation is correct, and Zain's is incorrect.

Step2: Analyze Zain's mistake

Zain added \(5.36 + 14.12\) incorrectly. Instead of adding the numbers as decimals (aligning the decimal points and adding the corresponding place values), Zain seems to have multiplied or added the digits in a wrong way. Specifically, he likely misaligned the numbers, perhaps treating \(5.36\) as \(53.6\) or making a similar error in place value, leading to the incorrect result of \(67.72\) instead of the correct \(19.48\).

Answer:

The person not chosen (Zain) incorrectly misaligned the numbers while adding (did not align decimal points properly), leading to an incorrect sum. He should have added the numbers as decimals with aligned decimal points, but instead, he performed the addition in a way that resulted in an incorrect total (e.g., treating \(5.36\) as a number with a different place value alignment, leading to \(5.36 + 14.12 = 67.72\) which is wrong; the correct sum is \(19.48\)).