36×2.5；（12.5+0.25）×8；0.125×7.2；401×0.32简便计算题目有一点多,不过,我会加分的,谢谢~~~~_数学解答

36×2.5；（12.5+0.25）×8；0.125×7.2；401×0.32简便计算
题目有一点多,不过,我会加分的,谢谢~~~~~

人气：172 ℃　时间：2020-04-14 07:47:57

解答

36×2.5
=9x4x2.5
=9x10
=90
（12.5+0.25）×8
=12.5x8+0.25x4x2
=100+1x2
=102
0.125×7.2
=0.125x8x0.9
=1x0.9
=0.9
401×0.32
=400x0.32+1x0.32
=128+0.32
=128.32