题目内容
计算题
(1)-3-(-5)+(-2)
(2)(-81)÷
×
÷(-16)
(3)-24×(-
+
-
)
(4)-14-
×[-3+(-3)2].
(1)-3-(-5)+(-2)
(2)(-81)÷
| 9 |
| 4 |
| 4 |
| 9 |
(3)-24×(-
| 1 |
| 2 |
| 3 |
| 4 |
| 1 |
| 3 |
(4)-14-
| 1 |
| 6 |
(1)-3-(-5)+(-2)
=-3+5-2
=0;
(2)(-81)÷
×
÷(-16)
=81×
×
×
=1
(3)-24×(-
+
-
)
=24×
-24×
+24×
=12-18+8
=2;
(4)-14-
×[-3+(-3)2]
=-1-
×[-3+9]
=-1-
×6
=-1-1
=-2.
=-3+5-2
=0;
(2)(-81)÷
| 9 |
| 4 |
| 4 |
| 9 |
=81×
| 4 |
| 9 |
| 4 |
| 9 |
| 1 |
| 16 |
=1
(3)-24×(-
| 1 |
| 2 |
| 3 |
| 4 |
| 1 |
| 3 |
=24×
| 1 |
| 2 |
| 3 |
| 4 |
| 1 |
| 3 |
=12-18+8
=2;
(4)-14-
| 1 |
| 6 |
=-1-
| 1 |
| 6 |
=-1-
| 1 |
| 6 |
=-1-1
=-2.
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