问题 解答题
(1.65×2+1.56×3×
4
5
-
9
50
)×0.3÷0.5
答案

(1.65×2+1.56×3×

4
5
-
9
50
)×0.3÷0.5

=(1.65×2+1.56×3×0.8-0.18)×0.3÷0.5

=(3.3+3.744-0.18)×0.3÷0.5

=6.864×0.3÷0.5

=2.0592÷0.5

=4.1184.

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