Question

1.8x2.24ⅹ12.5用简便方法怎样计算？

1.8x2.24x12.5简便方法怎么计算？

Answer 1

1.8*2.24*12.5=12.5*2*0.9*2.24=25*4*0.9*0.56=56*0.9=50.4

Answer 2

1.8X2.24X12.5=0.9X2X4X0.56X12.5=0.9X0.56X100=0.9X56=（1-0.1）X56＝56-5.6=50.4。