4.9乘4加5.1除以0.25的简便算法

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4.9乘4加5.1除以0.25的简便算法

4.9乘4加5.1除以0.25的简便算法
4.9乘4加5.1除以0.25的简便算法

4.9乘4加5.1除以0.25的简便算法
4.9*4+5.1除以0.25
=4.9*4+5.1*4
=(4.9+5.1)*4
=10*4
=40

4.9×4+5.1÷0.25
=4.9×4+5.1÷(1/4)
=4.9×4+5.1×4
=(4.9+5.1)×4
=10×4
=40