adding and subtracting

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1.
1 point
-10 + (-4)
2.
1 point
4- (-6)
3.
1 point
1 1/2 + 2 1/2
4.
1 point
1 1/2 + 2 1/2
5.
1 point
-27 + 16
6.
1 point
2 2/3 - 1 1/5
7.
1 point
45 +(-23)
8.
1 point
3 3/10 + 2 7/9
9.
1 point
3 1/4 + 2 3/7
10.
1 point
-10(3)
11.
1 point
2 1/3 x 1 1/3
12.
1 point
1/3 -1/6
13.
1 point
1/3 -1/6
14.
1 point
1/4 + 1/6
15.
1 point
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