0.25x1.25x3.2=0.25x4x8x1.25=1x10=10
把3.2分成0.8和4,先用0.25乘4,再算剩下的。聪明的你会的
解:0.25×1.25×3.2=﹙0.25×4﹚×﹙1.25×0.8﹚=1×1=1.
0.25×1.25×3.2=0.25×1.25×4×0.8=[0.25×4]×[1.25×0.8]=1×1=1
0.25x1.25x3.2=0.25x4x1.25x0.8=1x1=1