Adding
Subtracting
The Number Line
Mystery
100
-7 + 7
0
100
-5 - (-7)
2
100
Use a number line to explain why:
−3−(−6)=3
100
Tanner had $30.50. He bought a sandwich for $7.75, a drink for $1.25, and then earned $20.00 by mowing a neighbor’s lawn. How much money does Tanner have left?
$41.50
200
Chloe owes her friend $10. She borrowed another $6.50. How much money does she owe her friend?
$16.50
200
-4 - 6
-10
200
Draw and label a number line ranging -6 to 6. Label point A at 1. Move 5 units to the left, what number do you end up at?
200
You are planning a week-long backpacking trip.
You start with $80. During the trip:
You spend $31.75 on supplies
You earn $20.00 helping another group
You lose $14.00 due to damaged gear
You return unused food for an $8 refund
How much money do you have at the end of the trip?
$62.25
300
Laney had a balance of −$15 in her bank account. She deposited $23. What is her new balance?
$8
300
27 - (-9)
36
400
Ms. Dominguez still needs to raise $30.75 to meet her fundraising goal. Mr. Grosche donated $5.50 towards Ms. Dominguez's fundraiser. How much more money does she need to meet her goal?
$25.25
400
10 - 13
-3
500
Explain why the expression −4−(−6) is the same as −4+6. Then solve it.
Subtracting a negative is the same as adding a positive.
2
500
-9 - (-18)
9