题目内容
计算
(1)2-(-3)-5-|-7|
(2)(
+
-
-
)×(-36)
(3)(-2)2+[18-(-3)×2]÷2.
(4)-1100-(1-0.5)×
×[3-(-3)2].
(1)2-(-3)-5-|-7|
(2)(
| 7 |
| 9 |
| 5 |
| 6 |
| 3 |
| 4 |
| 7 |
| 18 |
(3)(-2)2+[18-(-3)×2]÷2.
(4)-1100-(1-0.5)×
| 1 |
| 3 |
(1)原式=2+3-5-7=-7;
(2)原式=-
×36-
×36+
×36+
×36
=-28-30+27+14
=-58+41
=-17;
(3)原式=4+[18+6]÷2
=4+12
=16;
(4)原式=-1-
×
×(3-9)
=-1-
×(-6)
=-1+1
=0.
(2)原式=-
| 7 |
| 9 |
| 5 |
| 6 |
| 3 |
| 4 |
| 7 |
| 18 |
=-28-30+27+14
=-58+41
=-17;
(3)原式=4+[18+6]÷2
=4+12
=16;
(4)原式=-1-
| 1 |
| 2 |
| 1 |
| 3 |
=-1-
| 1 |
| 6 |
=-1+1
=0.
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