题目内容
计算下列各题.
(1)
-
-
;
(2)(-24)×(
-
+
);
(3)2-6÷(-2)×(-
);
(4)(-1)2010+(1-0.5)×
×[2-(-3)2].
(1)
| 8 |
| 15 |
| 5 |
| 9 |
| 4 |
| 9 |
(2)(-24)×(
| 1 |
| 8 |
| 1 |
| 3 |
| 1 |
| 4 |
(3)2-6÷(-2)×(-
| 1 |
| 2 |
(4)(-1)2010+(1-0.5)×
| 1 |
| 3 |
(1)
-
-
=
-(
+
)
=
-1
=-
;
(2)(-24)×(
-
+
)
=-24×
+24×
-24×
=-3+8-6
=-1;
(3)2-6÷(-2)×(-
)
=2-3×
=2-1.5
=0.5;
(4)(-1)2010+(1-0.5)×
×[2-(-3)2]
=1+
×
×[2-9]
=1+
×
×[-7]
=1-
=-
.
| 8 |
| 15 |
| 5 |
| 9 |
| 4 |
| 9 |
=
| 8 |
| 15 |
| 5 |
| 9 |
| 4 |
| 9 |
=
| 8 |
| 15 |
=-
| 7 |
| 15 |
(2)(-24)×(
| 1 |
| 8 |
| 1 |
| 3 |
| 1 |
| 4 |
=-24×
| 1 |
| 8 |
| 1 |
| 3 |
| 1 |
| 4 |
=-3+8-6
=-1;
(3)2-6÷(-2)×(-
| 1 |
| 2 |
=2-3×
| 1 |
| 2 |
=2-1.5
=0.5;
(4)(-1)2010+(1-0.5)×
| 1 |
| 3 |
=1+
| 1 |
| 2 |
| 1 |
| 3 |
=1+
| 1 |
| 2 |
| 1 |
| 3 |
=1-
| 7 |
| 6 |
=-
| 1 |
| 6 |
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