题目内容
(0.72×0.4×0.35)÷(0.9×0.2×7)
分析:根据除以几个数的乘积,等于分别除以这几个数,去掉括号,再根据乘法交换律和结合律进行简算.
解答:解:(0.72×0.4×0.35)÷(0.9×0.2×7),
=0.72×0.4×0.35÷0.9÷0.2÷7,
=(0.72÷0.9)×(0.4÷0.2)×(0.35÷7)
=0.8×2×0.05,
=0.8×(2×0.05),
=0.8×0.1,
=0.08.
=0.72×0.4×0.35÷0.9÷0.2÷7,
=(0.72÷0.9)×(0.4÷0.2)×(0.35÷7)
=0.8×2×0.05,
=0.8×(2×0.05),
=0.8×0.1,
=0.08.
点评:四则运算,先弄清运算顺序,然后再进一步计算,能简算的要简算.
![](http://thumb2018.1010pic.com/images/loading.gif)
练习册系列答案
相关题目
0.56÷0.04= | 1.44÷2= | 24.6÷0.6= | 4.5÷0.15= |
0.63÷0.09= | 12.84÷1.2= | 3.9÷0.13= | 1.6÷1.6= |
20÷0.25= | 1.3÷2.5= | 100÷12.5= | 7.8÷0.13= |
3.24÷0.8= | 13×1.1= | 5.46÷3= | 4.07×3= |
5.28t-1.99t= | 0.6+89= | 5.7×0.1= | 1.6÷0.4= |
6÷0.3= | 5÷0.25= | 0.45×3= | 0.35×8= |
7.1-0.76= | 1.2×0.3= | 0.76÷4= | 1.9×0.8= |
4.2-2.8= | 7.2÷1.6= | 19.8+3.2= | 18-17.45= |
4.5+1.5= | 0.75x+0.25x= | 2.5×4= | 0.46÷2= |
0.7×1.4= | 1-0.92= | 8×0.125= | 3.4÷20= |
10a-1.8a= | 4.8×0.2= | 0.3÷0.15= | 0.15÷2= |
0.2×0.5= | 2.2-1.8= | 3.1+1.75= | 32.8+1.9= |
0.42×0.5= | 0.76+1.24= | 3.06-0.72= | 0.51÷17= |
5.2÷13= | 8.2×0.01= | 1.72-0.73= | 1.6×0.4= |
4.8b+3.2b= | 2.5×4= | 0.3×101= | 1.2×0.5= |