speed-grid/multiplication-4x4-medium · Série 1

2 problems
1
4×4 addition speed grid. Row: [10, 6, 7, 3] × Col: [1, 8, 3, 10] =
2
4×4 addition speed grid. Row: [6, 10, 8, 4] × Col: [5, 10, 2, 8] =
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