Question

1.2x3.7x0.85有什么简便方法计算吗？

Answer 1

1.2×3.7×0.85脱式计算
解题思路:四则运算规则(按顺序计算,先算乘除后算加减,有括号先算括号,有乘方先算乘方)即脱式运算(递等式计算)需在该原则前提下进行

解题过程:
1.2×3.7×0.85

=4.44×0.85

=3.774

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Answer 2

简便计算方法如下：
1.2×3.7×0.85
=（1+0.2）×0.85×3.7
=（1×0.85+0.2×0.85）×3.7
=1.02×（4-0.3）
=1.02×4-1.02×0.3
=4.08-0.306
=3.774

Answer 3

将1.2分为2*0.6
1.2*3.7*0.85
=2*0.6*0.85*3.7
=0.6*1.7*3.7
=2.02*3.7
=2*3.7+0.02*3.7
=7.4+0.074
=7.474