67×0.21-0.62=
7.2×0.1×28.5=
18.1×(0.92+3.93)=
43×[(0.24+0.875)÷0.2]=
[3.25×(4.7-3.5)]÷1.25=
67×0.21-0.62=7.2×0.1×28.5=18.1×(0.92+3.93)=43×[(0.24+0.875)÷0.2]=[3.25×(4.7-3.5)]÷1
答案:2 悬赏:30 手机版
解决时间 2021-04-05 14:01
- 提问者网友:爱了却不能说
- 2021-04-04 13:46
最佳答案
- 五星知识达人网友:长青诗
- 2019-10-15 03:37
解:(1)67×0.21-0.62,
=14.07-0.62,
=13.45;
(2)7.2×0.1×28.5,
=0.72×28.5,
=20.52;
(3)18.1×(0.92+3.93),
=18.1×4.85,
=87.785;
(4)43×[(0.24+0.875)÷0.2],
=43×[1.115÷0.2],
=43×5.575,
=239.725;
(5)[3.25×(4.7-3.5)]÷1.25,
=[3.25×1.2]÷1.25,
=3.9÷1.25,
=3.12.解析分析:(1)先算乘法,再算减法;(2)从左往右依次运算;(3)先算括号内的,再算括号外的;(4)(5)先算小括号内的,再算中括号内的,最后算括号外的.点评:此题主要查了小数的四则混合运算,注意运算顺序和运算法则.
=14.07-0.62,
=13.45;
(2)7.2×0.1×28.5,
=0.72×28.5,
=20.52;
(3)18.1×(0.92+3.93),
=18.1×4.85,
=87.785;
(4)43×[(0.24+0.875)÷0.2],
=43×[1.115÷0.2],
=43×5.575,
=239.725;
(5)[3.25×(4.7-3.5)]÷1.25,
=[3.25×1.2]÷1.25,
=3.9÷1.25,
=3.12.解析分析:(1)先算乘法,再算减法;(2)从左往右依次运算;(3)先算括号内的,再算括号外的;(4)(5)先算小括号内的,再算中括号内的,最后算括号外的.点评:此题主要查了小数的四则混合运算,注意运算顺序和运算法则.
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- 1楼网友:不甚了了
- 2021-02-27 03:03
你的回答很对
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