题目内容
计算:
(1)-
-(-
)+
+(-
).
(2)(-125
)÷(-5).
(3)[1-(1-0.5×
)]×[2-(-3)2].
(4)-62-(3-7)2-2×(-1)3-|-2|.
(1)-
| 1 |
| 4 |
| 5 |
| 6 |
| 2 |
| 3 |
| 1 |
| 2 |
(2)(-125
| 5 |
| 7 |
(3)[1-(1-0.5×
| 1 |
| 3 |
(4)-62-(3-7)2-2×(-1)3-|-2|.
(1)原式=-
+
+
-
=-
-
+
+
=-
+
=
;
(2)原式=(-125-
)÷(-5)
=125÷5+
÷5
=25+
=25
;
(3)原式=[1-(1-
)]×(2-9)
=
×(-7)
=-
;
(4)原式=-36-(-4)2-2×(-1)-2
=-36-16+2-2
=-52.
| 1 |
| 4 |
| 5 |
| 6 |
| 2 |
| 3 |
| 1 |
| 2 |
=-
| 1 |
| 4 |
| 1 |
| 2 |
| 5 |
| 6 |
| 2 |
| 3 |
=-
| 3 |
| 4 |
| 3 |
| 2 |
=
| 3 |
| 4 |
(2)原式=(-125-
| 5 |
| 7 |
=125÷5+
| 5 |
| 7 |
=25+
| 1 |
| 7 |
=25
| 1 |
| 7 |
(3)原式=[1-(1-
| 1 |
| 6 |
=
| 1 |
| 6 |
=-
| 7 |
| 6 |
(4)原式=-36-(-4)2-2×(-1)-2
=-36-16+2-2
=-52.
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