speed-grid/addition-5x5/hard · Sett 9
2 problems
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Klasse:
Dato:
1
4×4 addition speed grid. Row: [5, 9, 10, 3] × Col: [5, 9, 2, 10]
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2
4×4 addition speed grid. Row: [3, 1, 6, 9] × Col: [7, 6, 9, 5]
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