问题
解答题
计算题: (1)-9+12-(-3)+8 (2)-5+6÷(-2)×
(3)(-1)2008-54×(
(4)-14-(1-0.5)×
|
答案
(1)-9+12-(-3)+8
=-9+12+3+8
=14;
(2)-5+6÷(-2)×1 3
=-5-3×1 3
=-5-1
=-6;
(3)(-1)2008-54×(
-5 6
+4 9
)1 3
=1-54×
+54×5 6
-54×4 9 1 3
=1-45+24-18
=-38;
(4)-14-(1-0.5)×
×[2-(-3)2]1 3
=-1-
×1 2
×[2-9]1 3
=1-
×(-7)1 6
=-1+7 6
=
.1 6