7.98*90.1+79.8*0.94+3.99怎样简便计算
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7.98*90.1+79.8*0.94+3.99怎样简便计算
![7.98*90.1+79.8*0.94+3.99怎样简便计算](/uploads/image/z/1579852-28-2.jpg?t=7.98%2A90.1%2B79.8%2A0.94%2B3.99%E6%80%8E%E6%A0%B7%E7%AE%80%E4%BE%BF%E8%AE%A1%E7%AE%97)
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
=7.98*90.1+7.98*9.4+7.98*0.5
=7.98*(90.1+9.4+0.5)
=7.98*100
=798