Solve the following equation: −8+9. Use the number line as a model to find the solution.

Answer 1

To solve the equation −8+9, we can use a number line as a model.

Starting from -8 on the number line, we need to move 9 units in the positive direction.

-8 + 1 = -7
-8 + 2 = -6
-8 + 3 = -5
-8 + 4 = -4
-8 + 5 = -3
-8 + 6 = -2
-8 + 7 = -1
-8 + 8 = 0
-8 + 9 = 1

So the solution to the equation −8+9 is 1.