Tính bằng cách thuận tiện (theo mẫu):
Giải thích
a) 216 × 5 × 2 = 216 × (5 × 2)
= 216 × 10
= 2 160
b) 4 × 76 × 25 = (4 × 25) × 76
= 100 × 76
= 7 600
c) 5 × 19 × 2 = (5 × 2) × 19
= 10 × 19
= 190
d) 125 × 23 × 8 = (125 × 8) × 23
= 1 000 × 23
= 23 000
a) 216 × 5 × 2 = 216 × (5 × 2)
= 216 × 10
= 2 160
b) 4 × 76 × 25 = (4 × 25) × 76
= 100 × 76
= 7 600
c) 5 × 19 × 2 = (5 × 2) × 19
= 10 × 19
= 190
d) 125 × 23 × 8 = (125 × 8) × 23
= 1 000 × 23
= 23 000