CHSPE Number Sense and Operations 1 — Questions and Answers
Question 1: What is 3/4 + 5/6?
- 8/10
- 19/12 (Correct answer)
- 8/12
- 15/24
Correct answer: 19/12
Finding a common denominator of 12: 9/12 + 10/12 = 19/12.
Question 2: Which of the following is equivalent to 0.375?
- 3/8 (Correct answer)
- 3/5
- 4/8
- 2/5
Correct answer: 3/8
0.375 = 375/1000 = 3/8 when reduced to lowest terms.
Question 3: What is 15% of 80?
- 10
- 15
- 12 (Correct answer)
- 20
Correct answer: 12
15% of 80 = 0.15 × 80 = 12.
Question 4: If a recipe calls for 2 cups of flour for every 3 cups of sugar, how many cups of flour are needed for 9 cups of sugar?
- 4
- 5
- 6 (Correct answer)
- 7
Correct answer: 6
Set up the proportion 2/3 = x/9; solving gives x = 6.
Question 5: What is the value of 3 + 4 × 2 − 1?
- 13
- 10 (Correct answer)
- 14
- 6
Correct answer: 10
Following order of operations, multiply first: 4 × 2 = 8, then 3 + 8 − 1 = 10.
Question 6: What is the product of −6 and −4?
- -24
- 24 (Correct answer)
- -10
- 10
Correct answer: 24
A negative times a negative equals a positive: (−6)(−4) = 24.
Question 7: Which of the following numbers is prime?
- 9
- 15
- 17 (Correct answer)
- 21
Correct answer: 17
17 has no factors other than 1 and itself, making it prime.
