Some story problems take two steps. A letter can stand for the unknown number. Rounding helps us check that an answer makes sense. The times table is full of patterns we can explain.
14 blocks · 5 graded
16 blocks · 5 graded
15 blocks · 4 graded
13 blocks · 4 graded
14 blocks · 6 graded
10 blocks · 1 graded
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