CTET Class I to V 23 Dec 2021 Paper

A class III mathematics teacher gave the following questions to her students: 
$\frac{\mathrm{begin}\mathit{m}\mathit{a}\mathit{t}\mathit{r}\mathit{i}\mathit{x}256\backslash +173\backslash \mathrm{end}\mathit{m}\mathit{a}\mathit{t}\mathit{r}\mathit{i}\mathit{x}}{}$ $\frac{\mathrm{begin}\mathit{m}\mathit{a}\mathit{t}\mathit{r}\mathit{i}\mathit{x}28\backslash +32\backslash \mathrm{end}\mathit{m}\mathit{a}\mathit{t}\mathit{r}\mathit{i}\mathit{x}}{}$ $\frac{\mathrm{begin}\mathit{m}\mathit{a}\mathit{t}\mathit{r}\mathit{i}\mathit{x}129\backslash +76\backslash \mathrm{end}\mathit{m}\mathit{a}\mathit{t}\mathit{r}\mathit{i}\mathit{x}}{}$
Later she asks the students to solve a worksheet that has similar questions.
Which of the following statements is appropriate for the given situation?