Question

0.125*32+6.25*0.2+2.5*1.9怎么简便计算？

Answer 1

=0.25×0.5×32+2.5×2.5×0.2+2.5×1.9
=2.5×1.6+2.5×0.5+2.5×1.9
=2.5×（1.6+0.5+1.9）
=2.5×4
=10
解法分析：配凑，提取公因数2.5，利用乘法分配律逆用，按照四则运算法则进行运算，同级运算按顺序计算，所以就可以很快得出结果。

Answer 2

原式＝0.125×8×4+2.5×2.5×2+2.5×2-2.5×0.1＝4+12.5+5-0.25＝21.5-0.25＝21.25

Answer 3

0.125*32+6.25*0.2+2.5*1.9
=0.125*32+0.125*60*0.2+0.125*20*1.9
=0.125*（32+60*0.2+20*1.9）
=0.125*（32+12+38）
=0.125*82
=10.25

Answer 4

=0.125X32十0.125X50×0.2十0.125×20×1.9
=0.125×（32+10+38）
=0.125X80

Answer 5

=0.125×32+0.125×50×0.2+0.125×20×1.9
=0.125×(32+10+38)
=0.125×80
=10