88.8*8.7+11.2*9.9-11.2*1.2怎么做?_数学解答

88.8*8.7+11.2*9.9-11.2*1.2怎么做?

人气：389 ℃　时间：2020-05-23 03:33:10

解答

88.8*8.7+11.2*9.9-11.2*1.2
=88.8*8.7+11.2*(9.9-1.2)
=88.8*8.7+11.2*8.7
=(88.8+11.2)*8.7
=100*8.7
=870