speed-grid/addition-5x5/expert · 套题 9
2 problems
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1
4×4 addition speed grid. Row: [8, 6, 3, 1] × Col: [3, 6, 10, 5]
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2
4×4 addition speed grid. Row: [4, 10, 1, 8] × Col: [7, 10, 8, 9]
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