题目内容
(1.65×2+1.56×3×
-
)×0.3÷0.5．
| 4 |
| 5 |
| 9 |
| 50 |
（1.65×2+1.56×3×
-
）×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．
| 4 |
| 5 |
| 9 |
| 50 |
=（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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