问题
解答题
计算: (1)
(2)(20
(3)(6
(4)(8
|
答案
(1)原式=
×5
-10
×5 5
=5
-5;2
(2)原式=(80
-243
+43
)÷3 6
=60
÷3 6
=30
;2
(3)原式=(3
-2x
)÷3x x
=
÷3x x
=
;1 3
(4)原式=8
÷22
-32
÷26
-(3-22
+1)3
=4-
-4+23 3 2 3
=
.3 2