Fractions in the Kitchen
$100 — Clue: You need 34 cup of sugar but your measuring cup is 14 cup. How many times must you fill the 14 cup?
Divide 34 by 14. 34÷14=34.41=3.
$100 — Clue: An item costs $4.25. You buy 2. How much do you pay?
Multiply 4.25⋅2=8.50.
$100 — Clue: An item costs $4.25. You buy 2. How much do you pay?
Multiply 4.25⋅2=8.50.
$100 — Clue: The temperature is −3∘ and drops 5 degrees. What is the new temperature?
−3−5=−8.
$100 — Clue: If a car travels 60 miles in 1.5 hours, what is its average speed in miles per hour?
Speed = 60÷1.5=40 miles per hour.
$200 — Clue: A recipe calls for 23 teaspoon salt; you want to triple the recipe. How much salt total?
Multiply 23 by 3. 23⋅3=23⋅31=2.
$12.99 shirt is on sale 25% off. What is the sale price? (Use decimal operations.)
25% = 0.25. Discount = 12.99⋅0.25=3.2475. Sale price = 12.99−3.2475=9.7425. Rounded to cents: $9.74
$200 — Clue: A $12.99 shirt is on sale 25% off. What is the sale price? (Use decimal operations.)
25% = 0.25. Discount = 12.99⋅0.25=3.2475. Sale price = 12.99−3.2475=9.7425. Rounded to cents: $9.74.
$200 — Clue: A submarine at −120 meters ascends 45 meters. What is its new depth?
−120+45=−75.
$200 — Clue: A map scale: 1 inch = 30 miles. Two cities are 2.4 inches apart. How many miles apart?
2.4⋅30=72 miles.
$300 — Clue: You have 56 pound of flour and use 14 of it for a batch. How many pounds used?
Multiply 56 by 14. 56⋅14=524.
$300 — Clue: You spend $7.35, $2.49, and $4.16. What is the total?
Add: 7.35+2.49=9.84. Then 9.84+4.16=14.00.
$300 — Clue: You spend $7.35, $2.49, and $4.16. What is the total?
Add: 7.35+2.49=9.84. Then 9.84+4.16=14.00.
$300 — Clue: Evaluate (−6)×(−23).
Multiply: −6⋅−23=+123=4.
$300 — Clue: A recipe uses 2 cups flour for 5 servings. How many cups for 8 servings?
Rate = 2÷5=25 cups per serving. For 8 servings: 25⋅8=165=3.2 cups.
$400 — Clue: Two friends split a 78-pound cake in ratio 3:5. How much does the friend with the larger share get?
Total parts 3+5=8. Larger share = 58 of 78. Multiply: 58⋅78=3564.
$400 — Clue: A grocery bill of $48.60 is split among 4 people equally. How much per person?
Total parts 3+5=8. Larger share = 58 of 78. Multiply: 58⋅78=3564.
$400 — Clue: A grocery bill of $48.60 is split among 4 people equally. How much per person?
Divide 48.60÷4=12.15.
$400 — Clue: Compute −52÷2.
−52÷2=−52⋅12=−54.
$400 — Clue: A worker completes 712 of a job in 3 hours. At that rate, how long to finish the entire job?
Rate = 712÷3=712⋅13=736 job per hour. Time for 1 job = reciprocal: 367 hours
$500 — Clue: A baker has 1112 kg of chocolate. Each cookie needs 320 kg. How many whole cookies can be made? (Show division and integer result.)
Divide 1112 by 320. 1112÷320=1112⋅203=11⋅2012⋅3=22036=559. 559=619. Whole cookies = 6.
$500 — Clue: A baker has 1112 kg of chocolate. Each cookie needs 320 kg. How many whole cookies can be made? (Show division and integer result.)
Divide 1112 by 320. 1112÷320=1112⋅203=11⋅2012⋅3=22036=559. 559=619. Whole cookies = 6.
$500 — Clue: An item priced at $89.95 is taxed at 8.25%. What is the total cost including tax? Round to cents.
Tax = 89.95⋅0.0825=7.417875. Total = 89.95+7.417875=97.367875. Rounded to cents: $97.37 (or $97.36 if truncating; standard rounding gives $97.37).
$500 — Clue: A bank account balance is −$48.75. A deposit of $125.40 is made, then a withdrawal of $200. What is the final balance?
Start −48.75. After deposit: −48.75+125.40=76.65. After withdrawal: 76.65−200=−123.35.
$500 — Clue: A faucet fills a tank in 4.5 hours; another faucet fills it in 6 hours. If both run together, how long to fill the tank? Give exact fraction and decimal.
Rates: 1/4.5=29 tank/hour and 1/6 tank/hour. Combined rate = 29+16=418+318=718 tank/hour. Time = reciprocal: 187 hours ≈2.5714 hours.