1. $2.50 / 2 = $1.25 per liter
2. a) Type A: $2.79 / 20 oz = $0.1395 per oz; Type B: $3.29 / 24 oz = $0.1371 per oz
b) Type B is cheaper per ounce.
c) Type A: 20 oz * $0.1395/oz = $2.79; Type B: 24 oz * $0.1371/oz = $3.29; Total = $2.79 + $3.29 = $6.08
d) The pricing for each type of pen is not provided in the problem, so this cannot be calculated.
3. a) Type A: $1.40 / 4 oz = $0.35 per oz; Type B: $1.80 / 6 oz = $0.30 per oz
b) Type B is cheaper per ounce.
4. a) 2.5 lb bag: $2.50 / 2.5 = $1.00 per lb; 5 lb bag: $3.75 / 5 = $0.75 per lb
b) The 5 lb bag is cheaper per pound.
c) 2.5 lb bag: 2.5 * $1.00 = $2.50; 5 lb bag: 5 * $0.75 = $3.75; Total = $2.50 + $3.75 = $6.25
d) The 5 lb bag is the better buy.
5. a) 2.50 lb package: $3.50 / 2.50 = $1.40 per lb; 40 lb package: $6.12 / 40 = $0.153 per lb
b) The 40 lb package is cheaper per pound.
c) 2.50 lb package: 2.50 * $1.40 = $3.50; 40 lb package: 40 * $0.153 = $6.12; Total = $3.50 + $6.12 = $9.62
d) The 40 lb package is the better buy.
6. a) 250 ml: $2.60 / 250 = $0.0104 per ml; 500 ml: $2.70 / 500 = $0.0054 per ml; 1 liter: $4.00 / 1000 = $0.004 per ml
b) The 1 liter bottle is the best buy.
7. Original price: $43.00; Sale price: $39.75; Savings: $43.00 - $39.75 = $3.25; Percent off: ($3.25 / $43.00) * 100% ≈ 7.56%
8. a) 1 pint: $1.79 / 16 oz = $0.1119 per oz; 1 quart: $3.29 / 32 oz = $0.1028 per oz
b) The quart is cheaper per ounce.
c) Buying the quart saves money per pint because it costs less per ounce than the pint.
Parent Tip: Review the logic above to help your child master the concept of comparison shopping worksheet for students.
