题目内容
计算:
(1)(-8)+(+0.25)-(-9)+(-
)
(2)-14÷(-
)+8×(-
)
(3)(
-
+
)÷(-
)
(4)-14-
×[2-(-3)2].
(1)(-8)+(+0.25)-(-9)+(-
| 1 |
| 4 |
(2)-14÷(-
| 3 |
| 2 |
| 3 |
| 2 |
(3)(
| 3 |
| 4 |
| 5 |
| 6 |
| 7 |
| 12 |
| 1 |
| 36 |
(4)-14-
| 1 |
| 6 |
(1)原式=-8+0.25+9-
=-8+9=1;
(2)原式=14×
-8×
=
-
=-9;
(3)原式=(
-
+
)×(-36)=-27+30-21=-18;
(4)原式=-1-
×(2-9)=-1+
=
.
| 1 |
| 4 |
(2)原式=14×
| 2 |
| 3 |
| 3 |
| 2 |
| 28 |
| 3 |
| 24 |
| 2 |
(3)原式=(
| 3 |
| 4 |
| 5 |
| 6 |
| 7 |
| 12 |
(4)原式=-1-
| 1 |
| 6 |
| 7 |
| 6 |
| 1 |
| 6 |
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