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Directions: Perform the open
1. 12 + 34
2. (+15) + (+11)
3. (-10) + (-22)
4. 2016
5. (+23) - (+5)
6. (+19)-(-4)
7. (+10) (+2)
8. (-20) (-7)
9. (+11) (+2)(-3)
10. 40 + 8
11. (+25) + (+5)
12.(-16)+(-4)​