Method 1
1. 2 + 5 = 7
2. 5 + (-7) = 5 - 7 = -2
3. -2 + 6 = 6 - 2 = 4
4. -3 + (-5) = - 3 - 5 = -8
5. 2 + 4 = 6
Method 2
Use number line
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