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计算下面各题.6.45-2.74+3.645.36+(83.4-15.07)4.5+3.8+15.567.39-(12.67+17.39)35.62-8.38-5.622.06+5.42+3.94+2.58.

题目详情
计算下面各题.
6.45-2.74+3.6               
45.36+(83.4-15.07)
4.5+3.8+15.5
67.39-(12.67+17.39)
35.62-8.38-5.62           
2.06+5.42+3.94+2.58.






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答案和解析
(1)6.45-2.74+3.6=3.71+3.6=7.31;(2)45.36+(83.4-15.07)=45.36+68.33=113.69;(3)4.5+3.8+15.5=(4.5+15.5)+3.8=20+3.8=23.8;(4)67.39-(12.67+17.39)=67.39-12.67-17.39=(67.39-17.39)-12.67=50-12...