用简便方法计算.1.25×3.2×0.814.
答案:2 悬赏:50
解决时间 2021-03-14 10:25
- 提问者网友:花之森
- 2021-03-14 03:09
用简便方法计算. 1.25×3.2×0.8 14.5×102 4.38÷0.125÷0.8 6.4×4.5+3.6×4.5.
最佳答案
- 二级知识专家网友:啵啵桃汀
- 2021-04-19 01:21
(1)1.25×3.2×0.8,
=3.2×(1.25×0.8),
=3.2×1,
=3.2;
(2)14.5×102,
=14.5×100+14.5×2,
=1450+29,
=1479;
(3)4.38÷0.125÷0.8,
=4.38÷(0.125×0.8),
=4.38÷0.1,
=43.8;
(4)6.4×4.5+3.6×4.5.
=(6.4+3.6)×4.5,
=10×4.5,
=45.
=3.2×(1.25×0.8),
=3.2×1,
=3.2;
(2)14.5×102,
=14.5×100+14.5×2,
=1450+29,
=1479;
(3)4.38÷0.125÷0.8,
=4.38÷(0.125×0.8),
=4.38÷0.1,
=43.8;
(4)6.4×4.5+3.6×4.5.
=(6.4+3.6)×4.5,
=10×4.5,
=45.
全部回答
- 1楼网友:厭世為王
- 2021-04-19 02:45
1.2
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