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Worksheet Worksheet 2

1.
Calculate \(57 - 35\) using a number line.
2.
Calculate \(324 - 158\) using a number line.
3.
Think about (do not draw) the number line diagram you would need to calculate \(42 - 26\) and compute the result from that mental picture. Do you prefer this visualization or the base-10 blocks visualization? Why?
4.
Practice your mental arithmetic by performing the following calculations.
\begin{equation*} \begin{aligned} 41 - 27 \amp = \\ 53 - 38 \amp = \\ 39 - 25 \amp = \\ 82 - 54 \amp = \\ 67 - 48 \amp = \\ 43 - 37 \amp = \\ 344 - 257 \amp = \\ 401 - 235 \amp = \\ 518 - 276 \amp = \end{aligned} \end{equation*}