计算下面各题,能用简便方法算的用简便方法算。 (1)17.92-(0.3+7.92) (2)210

2025-06-20 11:20:55
推荐回答(1个)
回答1:

(1)原式=17.92-7.92-0.3
                =10-0.3
                =9.7
(2)原式=210÷(14×5)
                =210÷70
                =3
(3)原式= × + ×
                =( + )×
                =
(4)原式= ÷( ×
                = ×5
                =