Numerical Expressions — Answer Key
Part A: Multiple Choice
Circle the best answer for each question.
1. A store sells notebooks for $3 each and pens for $2 each. Emma buys 5 notebooks and 4 pens. Which expression shows her total cost?
A) (5 + 3) × (4 + 2)
B) (5 × 3) + (4 × 2)
C) 5 × (3 + 4) × 2
D) (5 + 4) × (3 + 2)
Cost of notebooks: 5 × $3. Cost of pens: 4 × $2. Total: (5 × 3) + (4 × 2).
2. A baker makes 8 trays of 12 muffins and gives away 16. Which expression shows how many muffins are left?
A) 8 × 12 − 16
B) 8 × (12 − 16)
C) (8 − 16) × 12
D) 8 + 12 − 16
Total muffins: 8 × 12. After giving away 16: 8 × 12 − 16 = 96 − 16 = 80.
3. Three friends split a $45 meal equally and each leaves a $4 tip. Which expression shows what each person pays total?
A) (45 ÷ 3) × 4
B) 45 ÷ (3 + 4)
C) (45 + 4) ÷ 3
D) (45 ÷ 3) + 4
Each person's share of the meal: 45 ÷ 3. Then each person adds their $4 tip: (45 ÷ 3) + 4.
4. A garden has 6 rows with 9 plants each. The gardener removes 2 plants from each row. Which expression shows total plants remaining?
A) 6 × 9 − 2
B) (6 − 2) × 9
C) 6 × (9 − 2)
D) 6 × 9 + 2
Each row has 9 − 2 = 7 plants remaining. Total: 6 × (9 − 2) = 6 × 7 = 42.
Part B: Fill in the Blank
Write the correct answer on each line.
1. A class of 28 students splits into 4 equal teams. Each team earns 15 points. Total points: 4 × 15 = 60.
4 × 15 = 60 total points. (Note: 28 ÷ 4 = 7 students per team, but the question asks about team points, not students per team.)
2. Write an expression: 3 boxes of 24 crayons, give away 12. Answer: (3 × 24) − 12
Total crayons: 3 × 24. After giving away 12: (3 × 24) − 12.
3. Evaluate: (3 × 24) − 12 = 60
(3 × 24) = 72. 72 − 12 = 60.
4. Write an expression: Earn $8 per hour for 6 hours, spend $13 on lunch. Answer: (8 × 6) − 13
Total earnings: 8 × 6. After spending $13: (8 × 6) − 13.
5. Evaluate: (8 × 6) − 13 = 35
(8 × 6) = 48. 48 − 13 = 35.