Toán Lớp 4: Tính nhanh (7 × 5 + 6 – 41) × (1 + 2 + 3 + 4 + 5 + 6 + 7 + 18 + 27)
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Toán Lớp 4: Tính nhanh (7 × 5 + 6 – 41) × (1 + 2 + 3 + 4 + 5 + 6 + 7 + 18 + 27)
Comments ( 2 )
= (35+6-41) × (1 + 2 + 3 + 4 + 5 + 6 + 7 + 18 + 27)
= (41-41) × (1 + 2 + 3 + 4 + 5 + 6 + 7 + 18 + 27)
= 0 × (1 + 2 + 3 + 4 + 5 + 6 + 7 + 18 + 27)
= 0
vì số nào nhân với 0 thì bằng 0