问题
解答题
计算: (1)3
(2)-2×(-
|
答案
(1)原式=(3
-1 2
)+(1 2
+21 3
)=3+3=6;2 3
(2)原式=-2×
-8+1 4
=-1 2
-8+1 2
=-8.1 2
计算: (1)3
(2)-2×(-
|
(1)原式=(3
-1 2
)+(1 2
+21 3
)=3+3=6;2 3
(2)原式=-2×
-8+1 4
=-1 2
-8+1 2
=-8.1 2