Answer:
1 must be added to (-2) to get (-1).
Step-by-step explanation:
Let 'x' denotes the number that needs to be added to (-2).
x added to (-2) is represented by,
x + (-2)
x + (-2) gives (-1)
Our algebraic equation is,
x + (-2) = -1
Now, add '2' to both sides,
x = (-1) + 2
x = 1
1 must be added to (-2) to get (-1).
