speed-grid/division-5x5/medium · セット 5
2 problems
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クラス:
日付：
1
4×4 addition speed grid. Row: [9, 2, 7, 5] × Col: [4, 8, 6, 7]
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2
4×4 addition speed grid. Row: [6, 1, 5, 4] × Col: [7, 2, 6, 4]
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