7.2*1.02 简便计算
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7.2*1.02 简便计算
68*0.99 都要简便计算
68*0.99 都要简便计算
![7.2*1.02 简便计算](/uploads/image/z/4626361-1-1.jpg?t=7.2%2A1.02+%E7%AE%80%E4%BE%BF%E8%AE%A1%E7%AE%97)
1.
7.2*(1+0.02)
=7.2+(7+0.2)*0.02
=7.2+0.14+0.004
=7.344
2.
68*(1-0.01)
=68-0.68
=67.32
7.2*(1+0.02)
=7.2+(7+0.2)*0.02
=7.2+0.14+0.004
=7.344
2.
68*(1-0.01)
=68-0.68
=67.32