5乘以8×98简便运算
问题描述：
5乘以8×98简便运算
899＋344简便运算 1248÷24简便运算
答
5×8×98
=40×98
=40×(100-2)
=40×100-40×2
=4000-80
=3920
899＋344
=(900-1)+344
=(900+343)+(1-1)
=12431248÷24简便运算1248÷24=1248÷4÷6=312÷6=52