Số? a) 12 × 4 = × 12 106 × 3 = 3 × (17 × 5) × 2 = 17 × (5 × ) 86 × 2 × 5 = 86 × (2 × )
Số?
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a) 12 × 4 = ? × 12 106 × 3 = 3 × ? |
(17 × 5) × 2 = 17 × (5 × ?) 86 × 2 × 5 = 86 × (2 ×? ) |
a)
12 × 4 = 4 × 12
106 × 3 = 3 × 106
(17 × 5) × 2 = 17 × (5 × 2)
86 × 2 × 5 = 86 × (2 × 5)