1.5×4.2-0.75÷0.25的简便计算

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1.5×4.2-0.75÷0.25的简便计算1.5×4.2-0.75÷0.25的简便计算1.5×4.2-0.75÷0.25的简便计算1.5*4.2-0.75÷0.25=1.5*2*2.1-3=3*2.

1.5×4.2-0.75÷0.25的简便计算
1.5×4.2-0.75÷0.25的简便计算

1.5×4.2-0.75÷0.25的简便计算
1.5*4.2-0.75÷0.25
=1.5*2*2.1-3
=3*2.1-3
=6.3-3
=3.3

1.5×4.2-0.75÷0.25=1.5*4+1.5*0.2-3=6.3-3=3.3