用递等式计算,能简便计算的要简便计算.
0.125×0.5×0.8
60.4×0.8-12.82.8+0.6×0.350.2÷2.5104×0.450.9×3.6+1.1×0.36.
用递等式计算,能简便计算的要简便计算.0.125×0.5×0.860.4×0.8-12.82.8+0.6×0.350.2÷2.5104×0.450.9×3.6+1.1
答案:2 悬赏:0 手机版
解决时间 2021-03-27 18:50
- 提问者网友:刺鸟
- 2021-03-27 01:54
最佳答案
- 五星知识达人网友:末日狂欢
- 2020-04-01 05:08
解:(1)0.125×0.5×0.8,
=0.125×0.8×0.5,
=0.1×0.5,
=0.05;
(2)60.4×0.8-12.8,
=48.32-12.8,
=35.52;
(3)2.8+0.6×0.35,
=2.8+0.21,
=3.01;
(4)0.2÷2.5,
=(0.2×4)÷(2.5×4),
=0.8÷10,
=0.08;
(5)104×0.45,
=(100+4)×0.45,
=100×0.45+4×0.45,
=45+1.8,
=46.8;
(6)0.9×3.6+1.1×0.36,
=(0.9+1.1)×3.6,
=2×3.6,
=7.2.解析分析:(1)运用乘法交换律简算;
(2)先算乘法,再算减法;
(3)先算乘法,再算加法;
(4)根据商不变规律简算;
(5)先把104分解成100+4,再运用乘法分配律简算;
(6)运用乘法分配律简算.点评:本题考查了四则混合运算,注意运算顺序和运算法则,灵活运用所学的运算定律进行简便计算.
=0.125×0.8×0.5,
=0.1×0.5,
=0.05;
(2)60.4×0.8-12.8,
=48.32-12.8,
=35.52;
(3)2.8+0.6×0.35,
=2.8+0.21,
=3.01;
(4)0.2÷2.5,
=(0.2×4)÷(2.5×4),
=0.8÷10,
=0.08;
(5)104×0.45,
=(100+4)×0.45,
=100×0.45+4×0.45,
=45+1.8,
=46.8;
(6)0.9×3.6+1.1×0.36,
=(0.9+1.1)×3.6,
=2×3.6,
=7.2.解析分析:(1)运用乘法交换律简算;
(2)先算乘法,再算减法;
(3)先算乘法,再算加法;
(4)根据商不变规律简算;
(5)先把104分解成100+4,再运用乘法分配律简算;
(6)运用乘法分配律简算.点评:本题考查了四则混合运算,注意运算顺序和运算法则,灵活运用所学的运算定律进行简便计算.
全部回答
- 1楼网友:鸽屿
- 2020-02-13 02:51
谢谢了
我要举报
如以上问答信息为低俗、色情、不良、暴力、侵权、涉及违法等信息,可以点下面链接进行举报!
大家都在看
推荐资讯