The number line shows the value of 5 - (-8) = 13.
What is a number line?
- A number line is a pictorial representation of integers on a straight line.
- This helps in performing many arithmetic operations.
- It consists of '0' in the middle i.e., zero is neither a positive nor a negative integer and it is taken as a reference point.
- It consists of positive integers(greater than zero) on the right side of '0'.
- It consists of negative integers(less than zero) on the left side of '0'.
How to represent arithmetic operations on a number line?
Addition:
- If the addend is positive then move to the right side on the number line
- If the addend is negative then move to the left side on the number line.
Subtraction:
- If the subtrahend is positive then move to the left side on the number line
- If the subtrahend is negative then move to the right side on the number line.
Representing the subtraction 5 - (-8) on a number line:
Here the given operation is subtraction. Where a subtrahend is a negative number i.e., -8.
Step1: Start from '5' on the number line.
Step2: Since the subtrahend is a negative number, move to the right side on the number line from '5'.
Step3: Thus, the number obtained on the line is 13.
Step4: Algebraically the result is 5 - (-8) = 5 + 8 = 13.
The number line for this operation is shown below.
Learn more about a number line here:
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