6.25×1.02÷1.5
=(6.25÷5)*(1.02÷0.3)
=1.25*3.4
=1.25*(3+0.4)
=1.25*3+1.25*0.4
=3.75+0.5
=4.25
6.25×1.02÷1.5
=6.25÷1.5 ×1.02
=1.25÷0.3 ×1.02
=1.25 ×1.02÷0.3
=1.25 ×3.4
=4.25
6.25×1.02÷1.5
=(6.25÷5)*(1.02÷0.3)
=1.25*3.4
=1.25*(3+0.4)
=1.25*3+1.25*0.4
=3.75+0.5
=4.25就是这样,不懂再问
6.25×1.02÷1.5 =6.25÷1.5 ×1.02——乘法交换律=(6.25÷5)÷(1.5÷3)×1.02=1.25÷0.3 ×1.02=1.25 ×1.02÷0.3=1.25 ×3.4=4.25
原式=6.25/5*(1.02/0.3)
=1.25*3.4
=1.25*0.8*4.25
=4.25
同问!!!