计算: (1)(-7
(2)
(3)4
(4)6-2
|
(1)原式=49×
=3 14
;21 2
(2)2 3
×(-2715 4
)=-5
×2715 3
=-455
;3
(3)原式=4
+35
-25
+42 2
=7
+25
;2
(4)原式=6-
-6
=6-3 6 2
.5 6 2
计算: (1)(-7
(2)
(3)4
(4)6-2
|
(1)原式=49×
=3 14
;21 2
(2)2 3
×(-2715 4
)=-5
×2715 3
=-455
;3
(3)原式=4
+35
-25
+42 2
=7
+25
;2
(4)原式=6-
-6
=6-3 6 2
.5 6 2