问题
解答题
计算: (1)2
(2)(4
(3)2
(4)(7+4
(5)(1+
|
答案
(1)原式=4
÷3
×5 2 2
=3 4
×8 3 5 2
=3 4
;3 2 5
(2)原式=4
÷22
-32
÷26
=2-2
;3 3 2
(3)原式=4
+23
-3
-4 3 3
=28 3 3
;3
(4)原式=72-(4
)2-(46-63
)=49-48-46+65
=-45+65
;5
(5)原式=[(1+
)(1-2
)] 2[(1+2
)(1-3
)] 2=4.3