3.7除以1.25有简便吗,有简便说明..列竖式

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3.7除以1.25有简便吗,有简便说明..列竖式
3.7除以1.25有简便吗,有简便说明..列竖式

3.7除以1.25有简便吗,有简便说明..列竖式
3.7÷1.25
=3.7÷(5/4)
=3.7×4÷5
=3.7÷5×4
=0.74×4
=2.96

3.7÷1.25=0.37÷0.125=0.37×8=(0.3+0.07)×0.8
=0.3×0.8+0.07×0.8
=0.24+0.056
=0.296

............上面的简便了么??
3.7÷1.25
=3.7 ÷ (5/4)
=3.7 * 4 ÷ 5
=3.7 * 0.8
= 2.96

1除以1.25是0.8,
3除以1.25是3乘以0.8为2.4,
0.7除以1.25是0.08乘以0.7为0.56,
0.56加2.4为2.96
以上纯口算可得

3.7/1.25
=3.75/1.25-0.05/1.25
=3-0.05*4/5
=3-0.04
=2.96