speed-grid/division-5x5/medium · セット 3
2 problems
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クラス:
日付：
1
4×4 addition speed grid. Row: [1, 8, 2, 6] × Col: [5, 8, 9, 2]
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2
4×4 addition speed grid. Row: [4, 7, 2, 8] × Col: [4, 3, 5, 1]
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