题目内容
计算:
(1)(-5
)-(+6
)-(-1
);
(2)(-
)-(-
)-(+
);
(3)16-(-8
)-4
.
(1)(-5
| 1 |
| 4 |
| 13 |
| 20 |
| 1 |
| 4 |
(2)(-
| 2 |
| 3 |
| 2 |
| 3 |
| 3 |
| 4 |
(3)16-(-8
| 1 |
| 3 |
| 2 |
| 3 |
(1)(-5
)-(+6
)-(-1
)
=-5
-6
+1
=-4-6
=-10
;
(2)(-
)-(-
)-(+
)
=-
+
-
=-
;
(3)16-(-8
)-4
=16+8
-4
=16+3
=19
.
| 1 |
| 4 |
| 13 |
| 20 |
| 1 |
| 4 |
=-5
| 1 |
| 4 |
| 13 |
| 20 |
| 1 |
| 4 |
=-4-6
| 13 |
| 20 |
=-10
| 13 |
| 20 |
(2)(-
| 2 |
| 3 |
| 2 |
| 3 |
| 3 |
| 4 |
=-
| 2 |
| 3 |
| 2 |
| 3 |
| 3 |
| 4 |
=-
| 3 |
| 4 |
(3)16-(-8
| 1 |
| 3 |
| 2 |
| 3 |
=16+8
| 1 |
| 3 |
| 2 |
| 3 |
=16+3
| 2 |
| 3 |
=19
| 2 |
| 3 |
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