Use number line to evaluate the following. (1). -5+(-3) (2). 4-(-4)
To use a number line to evaluate expressions, you need to add or subtract the numbers based on their positions on the number line.
Let's begin with the first expression: -5 + (-3).
(1) -5 + (-3):
To evaluate this expression using a number line, start at -5 on the number line and move to the left by 3 units. Moving to the left represents subtracting. So, going 3 units to the left from -5, you end up at -8.
Therefore, -5 + (-3) = -8.
Now let's move on to the second expression: 4 - (-4).
(2) 4 - (-4):
To evaluate this expression using a number line, start at 4 on the number line and move to the right by 4 units. Moving to the right represents adding. So, going 4 units to the right from 4, you end up at 8.
Therefore, 4 - (-4) = 8.
Using a number line helps visualize the addition or subtraction and gives you a clear understanding of how to solve the expression.