speed-grid/addition-5x5/hard · 套题 6
2 problems
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1
4×4 addition speed grid. Row: [8, 6, 1, 5] × Col: [5, 3, 9, 7]
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2
4×4 addition speed grid. Row: [5, 8, 2, 4] × Col: [5, 3, 8, 6]
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