题目内容
计算题:
(1)2×(﹣3)+(﹣2)2
(2)﹣9+5×(﹣6 )﹣12÷(﹣6 )
(3)|+8|﹣|﹣7|+(﹣1)2004﹣23
(4)
(5)
(1)2×(﹣3)+(﹣2)2
(2)﹣9+5×(﹣6 )﹣12÷(﹣6 )
(3)|+8|﹣|﹣7|+(﹣1)2004﹣23
(4)
(5)
解:
(1)原式=2×(﹣3)+4
=﹣6+4
=2;
(2)原式=(﹣9)﹣30+2
=﹣39+2
=﹣37;
(3)原式=8﹣7+1﹣8
=﹣6;
(4)原式=(﹣
)×
×(﹣6)×(﹣4)
=(﹣
)×(﹣6)×(﹣4)
=(﹣5)×(﹣4)
=20;
(5)原式=(﹣2)×
+8+
=(﹣
)+8+
=8.
(1)原式=2×(﹣3)+4
=﹣6+4
=2;
(2)原式=(﹣9)﹣30+2
=﹣39+2
=﹣37;
(3)原式=8﹣7+1﹣8
=﹣6;
(4)原式=(﹣
=(﹣
=(﹣5)×(﹣4)
=20;
(5)原式=(﹣2)×
=(﹣
=8.
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