题目内容
合理、灵活地计算.
| 5.5×17.3+6.7×5.5 | 12.5×32×2.5 | 7.28+3.2÷2.5 | 21.7÷1.25÷0.8. |
(1)5.5×17.3+6.7×5.5,
=5.5×(17.3+6.7),
=5.5×24,
=132;
(2)12.5×32×2.5,
=12.5×8×4×2.5,
=(12.5×8)×(4×2.5),
=100×10,
=1000;
(3)7.28+3.2÷2.5,
=7.28+1.28,
=8.56;
(4)21.7÷1.25÷0.8,
=21.7÷(1.25×0.8),
=21.7÷1,
=21.7.
=5.5×(17.3+6.7),
=5.5×24,
=132;
(2)12.5×32×2.5,
=12.5×8×4×2.5,
=(12.5×8)×(4×2.5),
=100×10,
=1000;
(3)7.28+3.2÷2.5,
=7.28+1.28,
=8.56;
(4)21.7÷1.25÷0.8,
=21.7÷(1.25×0.8),
=21.7÷1,
=21.7.
练习册系列答案
相关题目