a)

Każdą z danych liczb dzielimy przez $3$.

$\begin{array}{l}\underline{1216}\\ 3648:3\\ \underline{-3}\\ 06\\ \underline{-6}\\ 04\\ \underline{-3}\\ 18\\ \underline{-18}\\ 0\end{array}$

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$\begin{array}{l}\underline{1507}\\ 4521:3\\ \underline{-3}\\ 15\\ \underline{-15}\\ 02\\ \underline{-0}\\ 21\\ \underline{-21}\\ 0\end{array}$

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$\begin{array}{l}\underline{22680}\\ 68040:3\\ \underline{-6}\\ 08\\ \underline{-6}\\ 20\\ \underline{-18}\\ 24\\ \underline{-24}\\ 00\\ \underline{-0}\\ 0\end{array}$

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$\begin{array}{l}\underline{78362}\\ 235086:3\\ \underline{-21}\\ 25\\ \underline{-24}\\ 10\\ \underline{-9}\\ 18\\ \underline{-18}\\ 06\\ \underline{-6}\\ 0\end{array}$

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b)

Podane liczby dzielimy przez $5$

$\begin{array}{l}\underline{159}\\ 795:5\\ \underline{-5}\\ 29\\ \underline{-25}\\ 45\\ \underline{-45}\\ 0\end{array}$

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$\begin{array}{l}\underline{308}\\ 1540:5\\ \underline{-15}\\ 04\\ \underline{-0}\\ 40\\ \underline{-40}\\ 0\end{array}$

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$\begin{array}{l}\underline{715}\\ 3575:5\\ \underline{-35}\\ 07\\ \underline{-5}\\ 25\\ \underline{-25}\\ 0\end{array}$

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$\begin{array}{l}\underline{4013}\\ 20065:5\\ \underline{-20}\\ 00\\ \underline{-0}\\ 06\\ \underline{-5}\\ 15\\ \underline{-15}\\ 0\end{array}$