After we worked on adding and subtracting my girls added more Numbers to the line and jumped by twos and threes, working on skip counting.
我们学习了加减法后，孩子们又在数字列上加进许多新的数字，并隔2,3个数字跳来学习跳跃计数。
Solve each problem by addition, skip-counting and multiplication.
用加法、跳跃计数和乘法解答以下各题。
Solve each problem by addition, skip-counting and multiplication.
用加法、跳跃计数和乘法解答以下各题。
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