求解一道计算题,要用简便算法：0.125*3.2+0.125*5.8-1/8务必答对_数学解答

求解一道计算题,要用简便算法：0.125*3.2+0.125*5.8-1/8
务必答对

人气：358 ℃　时间：2019-11-07 16:08:11

解答

0.125*3.2+0.125*5.8-1/8
=0.125*8*0.4+0.125*5.8-0.125
=1*0.4+0.125*5+0.125*0.8-0.125
=0.4+0.125*(5-1)+0.1
=0.4+0.5+0.1
=1