问题
解答题
计算: (1)2
(2)
(3)
(4)(
(5)(2
(6)(
(7)
(8)
|
答案
(1)原式=4
+123 3
=16
;3
(2)原式=
+27 7
-107 7
=-55 7
;7
(3)原式=4
-2
+3 2 2 2 4
=11 4
;2
(4)原式=6-5=1;
(5)原式=12+18-126
=30-12
;6
(6)原式=(2
+5
)×5
-21 5
=3-2=1;
(7)原式=
×3m 2 3
+3m
×6m 2
-m3m 3m
=2m
+3m3m
-m3m 3m
=0;
(8)原式=
× 2
+13
+
-1 3
-13
+13 2
=
-1+3
+13 2
=3 2
.3