# Grocery Shopping (Double Number Line)

- Author:
- Jennifer Silverman, IM 6 – 8 Math

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Answer each question and explain or show your reasoning. If you get stuck, consider drawing a double number line diagram.
1. Eight avocados cost $4.
a. How much do 16 avocados cost?
b. How much do 20 avocados cost?
c. How much do 9 avocados cost?
2. Twelve large bottles of water cost $9.
a. How many bottles can you buy for $3?
b. What is the cost per bottle of water?
c. How much would 7 bottles of water cost?
3. A 10-pound sack of flour costs $8.
a. How much does 40 pounds of flour cost?
b. What is the cost per pound of flour?