-2
Explanation:
The given expression: -9 + 7
To get the answer, draw a number line that spans from negative to positive numbers. You could draw from -9 to 9.
Starting from -9 on the number line, move towards the right 7 times.
The number you stop at is the answer.
When you follow this step, the number you stop at will be at number -2.
-9 + 7 = -2
