问题
解答题
计算:(1)2
(2)(2
(3)(
(4)|-2|-(1+
|
答案
(1)2
-648
+51 3 12
=8
-23
+103 3
=(8-2+10)3
=16
;3
(2)(2
-53
)(2
-23
)2
=2
×3
-23
×23
-52
×2
+53
×22 2
=6-4
-56
+206
=26-9
;6
(3)(
)2+(
+16 2
)2
-16 2
=
+6+2
+16 4 6-2
+16 4
=
;7 2
(4)|-2|-(1+
)0+2 4
=2-1+2
=-1.