问题
解答题
计算或化简: (1)
(2)(2
(3)
|
答案
(1)
-12
-18
+0.5
=23 3
-33
-2
+2 2
=33
-3
;7 2 2
(2)(2
+35
)2-(23
-35
)23
=(2
+35
+23
-35
)(23
+35
-23
+35
)3
=4
×65 3
=24
;15
(3)
-18
-2 2
+(8 2
-1)05
=3
-2
-2
+12
=
+1.2