7.8*2.02简便计算
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![7.8*2.02简便计算](/uploads/image/z/1973687-23-7.jpg?t=7.8%2A2.02%E7%AE%80%E4%BE%BF%E8%AE%A1%E7%AE%97)
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7.8*2.02简便计算
7.8*2.02简便计算
7.8*2.02简便计算
7.8*2.02=7.8*(2+0.02)
=7.8*2+7.8*0.02
=15.6+0.156=15.756
(1)8*2.02=16.16
0.2*2.02=0.404
16.16-0.404=15.756
(2)7.8*1.01=7.878
7.878*2=15.756