15.37*7.89-9.37*7.89+15.37*2.11-9.37*2.11怎样简算?_数学解答

15.37*7.89-9.37*7.89+15.37*2.11-9.37*2.11怎样简算?

人气：341 ℃　时间：2020-03-21 03:21:42

解答

15.37*7.89-9.37*7.89+15.37*2.11-9.37*2.11
=15.37*(7.89+2.11)-9.37*(7.89+2.11)
=15.37*10-9.37*10
=10*(15.37-9.37)
=10*6
=60