简便方法如下:
3.2X2.5+0.32X75
解:3.2x(2.5+7.5)
= 3.2x10
=32
3.2X2.5+0.32X75
=3.2X2.5+3.2X7.5
=3.2x(2.5+7.5)
=3.2x10
=32
用乘法分配律简算
原式=0.32×25+0.32×75
=0.32×(25+75)
=0.32×100
=32
解答:3.2*2.5+0.32*75
=3.2*2.5+3.2*0.1*75
=3.2*(2.5+7.5)
=3.2*10
=32
3.2×2.5+0.32×75
=3.2X2.5+3.2×7.5
=3.2X(2.5+7.5)
=3.2×10
=32