题目内容
计算:
(1)12-(-16)+(-4)-5
(2)(-
-
+
)÷(-
)
(3)-|-54|×2
÷(-4
)×|-
|
(4)-14-(1-0.5)×
×[2-(-3)2].
(1)12-(-16)+(-4)-5
(2)(-
| 2 |
| 9 |
| 1 |
| 4 |
| 1 |
| 18 |
| 1 |
| 36 |
(3)-|-54|×2
| 1 |
| 4 |
| 1 |
| 2 |
| 2 |
| 9 |
(4)-14-(1-0.5)×
| 1 |
| 3 |
(1)原式=12+16-4-5=28-9=19;
(2)原式=(-
-
+
)×(-36)=8+9-2=15;
(3)原式=-54×
×(-
)×
=6;
(4)原式=-1-
×
×(-7)=-1+
=
.
(2)原式=(-
| 2 |
| 9 |
| 1 |
| 4 |
| 1 |
| 18 |
(3)原式=-54×
| 9 |
| 4 |
| 2 |
| 9 |
| 2 |
| 9 |
(4)原式=-1-
| 1 |
| 2 |
| 1 |
| 3 |
| 7 |
| 6 |
| 1 |
| 6 |
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