7.98*90.1+79.8*0.94+3.99怎样简便计算_数学解答

7.98*90.1+79.8*0.94+3.99怎样简便计算

人气：378 ℃　时间：2019-08-30 14:27:52

解答

7.98*90.1+79.8*0.94+3.99
=7.98*90.1+7.98*9.4+7.98*0.5
=7.98*(90.1+9.4+0.5)
=7.98*100
=798