40.7减2.6以9.3简便算法怎么算_数学解答

40.7减2.6以9.3简便算法怎么算

人气：218 ℃　时间：2019-10-31 03:25:35

解答

40.7减2.6以9.3
=40.7-2.6×（10-0.7）
=40.7-2.6×10+2.6×0.7
=40.7-26+1.82
=14.7+1.82
=16.52