问题:
计算:
(1)(-9)-(+10)-(+2)-(-8)
(2) (-8.4)+1
1
2
+(-
2
5
)+(-0.3)+2
3
5
(3)(-5.3)+(-3.2)-(-2.5)-(+4.8)
(4)12+(-3)-(+15)-(-4)
(5) -
1
3
+
3
4
-
5
6
-
1
2
(6) (+
7
13
)+(+17)+(-1
1
3
)-(+7)-(-2
1
3
)+(-
7
13
).
计算:
(1)(-9)-(+10)-(+2)-(-8)
(2) (-8.4)+1
+(-
)+(-0.3)+2
(3)(-5.3)+(-3.2)-(-2.5)-(+4.8)
(4)12+(-3)-(+15)-(-4)
(5) -
+
-
-
(6) (+
)+(+17)+(-1
)-(+7)-(-2
)+(-
).
(1)(-9)-(+10)-(+2)-(-8)
(2) (-8.4)+1
1 |
2 |
2 |
5 |
3 |
5 |
(3)(-5.3)+(-3.2)-(-2.5)-(+4.8)
(4)12+(-3)-(+15)-(-4)
(5) -
1 |
3 |
3 |
4 |
5 |
6 |
1 |
2 |
(6) (+
7 |
13 |
1 |
3 |
1 |
3 |
7 |
13 |
参考答案: