Question

cw#8: add/subtract d
next gen
math no work - no credit first & last na
1
starting at zero, which expression represents the
number line shown below?
<----|----|----|----|----|----|----|--->
-3 -2 -1 0 1 2 3
a 0.5 - 1.25
b 1.25 - 0.5
c 0.5 + 1.25
d 1.25 + 0.5

2
starting at zero, which expression represents the
number line shown below?
<----|----|----|----|----|----|----|--->
-3 -2 -1 0 1 2 3
a 2.75 + (-1\frac{1}{2})
b (-1\frac{1}{2}) - 1.75
c (-1\frac{1}{2}) + 1.75
d 1.75 - (-1\frac{1}{2})

5 what is the value of this expression?
15 + 14.1 + (-0.2) =

Explanation:

Step1: Analyze Q1 number line

The number line starts at 0.5, then moves right 1.25 units (addition).
Expression: $0.5 + 1.25$

Step2: Match Q1 to option

This matches option C.

Step3: Analyze Q3 number line

The number line starts at $-1\frac{1}{2}$, then moves right 1.75 units (addition).
Expression: $-1\frac{1}{2} + 1.75$

Step4: Match Q3 to option

This matches option C.

Step5: Simplify Q5 expression

First, rewrite subtraction of negative as addition: $1.5 + 14.1 + 0.2$

Step6: Calculate Q5 sum

Add the values: $1.5 + 14.1 = 15.6$; $15.6 + 0.2 = 15.8$

Answer:

1. C. 0.5 + 1.25
2. C. $(-1\frac{1}{2}) + 1.75$
3. $15.8$