问题
解答题
计算: (1)(+26)+(-18)+5+(-16); (2)(-1
|
答案
(1)(+26)+(-18)+5+(-16)=26-18+5-16=31-34=-3;
(2)(-1
)+12 3
+(+71 2
)+(-21 4
)+(-81 3
)=-11 2
-22 3
+11 3
-81 2
+71 2
=-4-7+71 4
=-31 4
.3 4
计算: (1)(+26)+(-18)+5+(-16); (2)(-1
|
(1)(+26)+(-18)+5+(-16)=26-18+5-16=31-34=-3;
(2)(-1
)+12 3
+(+71 2
)+(-21 4
)+(-81 3
)=-11 2
-22 3
+11 3
-81 2
+71 2
=-4-7+71 4
=-31 4
.3 4