问题
解答题
计算: (1)4
(2)(5
(3)
|
答案
(1)原式=2
×(-2
)×1 6 2 3 3
=-
;2 6 9
(2)原式=(20
-183
+43
)÷15 3
=20-18+45
=2+4
;5
(3)原式=2
+3x
-2x x
=3
.x
计算: (1)4
(2)(5
(3)
|
(1)原式=2
×(-2
)×1 6 2 3 3
=-
;2 6 9
(2)原式=(20
-183
+43
)÷15 3
=20-18+45
=2+4
;5
(3)原式=2
+3x
-2x x
=3
.x