问题
解答题
计算: (1)-16+23+(-17)-(-7) (2)(-1)2012×6+8÷(-2)3 (3)(-36)×(
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答案
(1)-16+23+(-17)-(-7)
=-16+23-17+7
=-3;
(2)(-1)2012×6+8÷(-2)3
=1×6+8÷(-8)
=6-1
=5;
(3)(-36)×(
-3 4
+5 6
)7 9
=-36×
+36×3 4
-36×5 6 7 9
=-27+30-28
=-25.