简便计算:6/7×13+6/7 6.42×1.01-6.42 80.7×8.7+8.07×13

来源:学生作业帮助网 编辑:作业帮 时间:2024/12/02 04:36:08
简便计算:6/7×13+6/7 6.42×1.01-6.42 80.7×8.7+8.07×13
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简便计算:6/7×13+6/7 6.42×1.01-6.42 80.7×8.7+8.07×13
简便计算:6/7×13+6/7 6.42×1.01-6.42 80.7×8.7+8.07×13

简便计算:6/7×13+6/7 6.42×1.01-6.42 80.7×8.7+8.07×13
6/7×13+6/7
=6/7×(13+1)
=6/7×14
=12
6.42×1.01-6.42
=6.42×(1.01-1)
=6.42×0.01
=0.0642
80.7×8.7+8.07×13
=8.07×87+8.07×13
=8.07×(87+13)
=8.07×100
=807

1、= 6/7×(13+1)=12 2、=6.42×(1.01-1)=0.0642 3、=8.07×(87+13)=807

6/7(13+1)=12
6.42(1.01-1)=0.0642
8.07(87+13)=807