问题
解答题
不用计算器计算: (1)2
(2)
(3)|1-
(4)(
|
答案
(1)原式=
;3
(2)原式=
×25 2
÷22 5
=2
÷25 5
=1;
(3)原式=
-1+13
=
;3
(4)原式=(
-1)2+23
-43
=4-2
+23
-43
=0.
不用计算器计算: (1)2
(2)
(3)|1-
(4)(
|
(1)原式=
;3
(2)原式=
×25 2
÷22 5
=2
÷25 5
=1;
(3)原式=
-1+13
=
;3
(4)原式=(
-1)2+23
-43
=4-2
+23
-43
=0.