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