问题
解答题
计算 (1)-16+23+(-17)-(-7) (2)0-
(3)
(4)[2
|
答案
(1)-16+23+(-17)-(-7)
=-16+23-17+7
=-33+30
=-3;
(2)0-
-(-1 2
)+(-3 4
)-5 6 2 3
=-
+6 12
-9 12
-10 12 8 12
=-1
;1 4
(3)
÷(-22 5
)-2 5
×(-18 21
)-0.5÷2×3 4 7 2
=-
+1 6
-2 3
×1 2
×1 2 7 2
=-
+1 6
-2 3 7 8
=-
;3 8
(4)[2
-(1 2
-7 9
+11 12
)×36]÷51 6
=[2
-(28-33+6)]÷51 2
=[2
-1]÷51 2
=
÷53 2
=
.3 10