Answer:
When we add two number using number line,
We start with the first number,
If the second number is positive then we count to right side
While, if the it is negative then we count to left side
Here, the given expression,
−25+45
Start from -25,
Since, 45 is a positive number,
Thus, count 45 jumps from -25 to right side of the number line,
The final position would be 20,
Hence, −25+45 = 20
