题目内容
脱式计算.
7.32-4.37×0.9 | 4.05÷0.05÷0.81 |
0.048×90×0.46(保留两位小数) | 76.2÷0.16-0.16(保留一位小数) |
分析:(1)先算乘法,再算减法;
(2)按照从左向右的顺序进行计算;
(3)按照从左向右的顺序进行计算;
(4)先算除法,再算减法.
(2)按照从左向右的顺序进行计算;
(3)按照从左向右的顺序进行计算;
(4)先算除法,再算减法.
解答:解:
(1)7.32-4.37×0.9,
=7.32-3.933,
=3.387;
(2)4.05÷0.05÷0.81,
=81÷0.81,
=100;
(3)0.048×90×0.46,
=4.32×0.46,
≈1.99;
(4)76.2÷0.16-0.16,
=476.25-0.16,
≈476.1.
(1)7.32-4.37×0.9,
=7.32-3.933,
=3.387;
(2)4.05÷0.05÷0.81,
=81÷0.81,
=100;
(3)0.048×90×0.46,
=4.32×0.46,
≈1.99;
(4)76.2÷0.16-0.16,
=476.25-0.16,
≈476.1.
点评:根据题意,先弄清运算顺序,然后再进一步计算.
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