Calculating Unit Prices worksheet with math problems for determining unit costs and comparing prices.

Let’s solve each part step by step. We’re finding the unit price — that means how much one item (or one ounce, pound, quart, etc.) costs.

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Part 1: Calculate the unit price of each item

We divide total cost by number of units.

1. $3 for 2 boxes of crackers
→ $3 ÷ 2 = $1.50 per box

2. $9 for 4 boxes of granola bars
→ $9 ÷ 4 = $2.25 per box

3. 3-pound bag of apples for $3.57
→ $3.57 ÷ 3 = $1.19 per pound

4. $4.32 for 18 ounces of cereal
→ $4.32 ÷ 18 = $0.24 per ounce

5. $7.20 for 120 fluid ounces of laundry detergent
→ $7.20 ÷ 120 = $0.06 per fluid ounce

6. $3.87 for 1.5 yards of fabric
→ $3.87 ÷ 1.5 = $2.58 per yard

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Part 2: Keep going! Round to nearest cent if needed.

7. 5 notebooks for $7.37
→ $7.37 ÷ 5 = $1.474 → round to $1.47 per notebook

8. 1.4 pounds of broccoli for $2.24
→ $2.24 ÷ 1.4 = $1.60 per pound

9. $12.48 for 16 quarts of potting soil
→ $12.48 ÷ 16 = $0.78 per quart

10. 6-pack of pens for $9.69
→ $9.69 ÷ 6 = $1.615 → round to $1.62 per pen

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Part 3: Circle the better buy in each problem

Better buy = lower unit price.

11. 3 quarts of juice for $5.82 vs 2 quarts for $3.94

- First option: $5.82 ÷ 3 = $1.94 per quart
- Second option: $3.94 ÷ 2 = $1.97 per quart
→ Better buy: 3 quarts for $5.82

12. $5.60 for a 10-pack of batteries vs $9.84 for a 15-pack

- First: $5.60 ÷ 10 = $0.56 per battery
- Second: $9.84 ÷ 15 = $0.656 → rounds to $0.66 per battery
→ Better buy: $5.60 for 10-pack

13. 24-pack of pencils for $2.64 vs 18-pack for $2.34

- First: $2.64 ÷ 24 = $0.11 per pencil
- Second: $2.34 ÷ 18 = $0.13 per pencil
→ Better buy: 24-pack for $2.64

14. $2.46 for 12-ounce jar of jam vs $3.44 for 16-ounce jar

- First: $2.46 ÷ 12 = $0.205 → rounds to $0.21 per ounce
- Second: $3.44 ÷ 16 = $0.215 → rounds to $0.22 per ounce
→ Better buy: $2.46 for 12-ounce jar

Wait — let me double-check #14:

Actually, $2.46 ÷ 12 = 0.205 → which is closer to $0.21
$3.44 ÷ 16 = 0.215 → which is closer to $0.22
So yes, first is cheaper per ounce.

But wait — sometimes rounding can trick us. Let’s compare exact values:

First: 2.46 / 12 = 0.205
Second: 3.44 / 16 = 0.215
Yes, 0.205 < 0.215 → so first is still better.

BUT — hold on! I think I made a mistake here. Let me recalculate:

Actually, 3.44 ÷ 16:

16 × 0.21 = 3.36
3.44 - 3.36 = 0.08 → so 0.21 + (0.08/16) = 0.21 + 0.005 = 0.215 → correct.

And 2.46 ÷ 12:

12 × 0.20 = 2.40
2.46 - 2.40 = 0.06 → 0.06 ÷ 12 = 0.005 → so 0.205 → correct.

So 0.205 < 0.215 → first is better.

BUT — wait again! The question says “circle the better buy” — meaning which gives you more value? Actually, we want the LOWEST cost per unit.

So yes, $0.205 per oz is less than $0.215 per oz → so 12-oz jar is better.

However, let me check with another method: How much would 48 ounces cost in each?

First: 12 oz for $2.46 → 48 oz = 4 × $2.46 = $9.84
Second: 16 oz for $3.44 → 48 oz = 3 × $3.44 = $10.32
So yes, first is cheaper for same amount → better buy.

✔ Confirmed.

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Final Answer:

Part 1:
- Crackers: $1.50 per box
- Granola bars: $2.25 per box
- Apples: $1.19 per pound
- Cereal: $0.24 per ounce
- Laundry detergent: $0.06 per fluid ounce
- Fabric: $2.58 per yard

Part 2:
- Notebooks: $1.47 per notebook
- Broccoli: $1.60 per pound
- Potting soil: $0.78 per quart
- Pens: $1.62 per pen

Part 3 (better buys):
- 3 quarts of juice for $5.82
- $5.60 for a 10-pack of batteries
- 24-pack of pencils for $2.64
- $2.46 for a 12-ounce jar of jam