taluppfattning

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1.
1 point
15-4
2.
1 point
-20-(-20)
3.
1 point
16-30
4.
1 point
(-15)-(17)
5.
1 point
-15-4
6.
1 point
-8-(12)
7.
1 point
-9+(-6)
8.
1 point
-2-(-6)
9.
1 point
-3-12
10.
1 point
-20+(-20)
11.
1 point
-4-(15)