4.12除以0.25-0.12乘以4(简便运算)4.12除以0.25-0.12乘以4(简便运算)

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4.12除以0.25-0.12乘以4(简便运算)4.12除以0.25-0.12乘以4(简便运算)

=4.12×4-0.12×4
=(4.12-0.12)×4
=4×4
=16

4.12/0.25-0.12*4
=4.12*4-0.12*4
注:0.25即为1/4,除以1/4,即为乘以4
=(4.12-0.12)*4
=4*4
=16