NBT NBT Mathematics: Number Sense and Calculations 2 — Questions and Answers
Question 1: What is the value of 3/4 + 2/3?
- 5/7
- 17/12 (Correct answer)
- 11/12
- 5/12
Correct answer: 17/12
Using a common denominator of 12: 9/12 + 8/12 = 17/12.
Question 2: Which fraction is equivalent to the decimal 0.375?
- 1/4
- 2/5
- 3/8 (Correct answer)
- 3/7
Correct answer: 3/8
0.375 = 375/1000, which simplifies to 3/8 by dividing numerator and denominator by 125.
Question 3: What is 2.5% of 840?
- 2.10
- 21 (Correct answer)
- 210
- 0.21
Correct answer: 21
2.5% = 0.025, and 0.025 × 840 = 21.
Question 4: What is (1/2) ÷ (3/4)?
- 3/8
- 2/3 (Correct answer)
- 1/6
- 8/3
Correct answer: 2/3
Dividing by 3/4 means multiplying by its reciprocal 4/3: (1/2) × (4/3) = 4/6 = 2/3.
Question 5: What is the value of |−9| + |4| − |−2|?
- 3
- 11 (Correct answer)
- 15
- −7
Correct answer: 11
The absolute values are 9, 4, and 2, so the expression equals 9 + 4 − 2 = 11.
Question 6: A shirt originally costs $80 and is discounted by 15%. What is the sale price?
- $65.00
- $68.00 (Correct answer)
- $70.00
- $72.00
Correct answer: $68.00
A 15% discount means paying 85% of $80: 80 × 0.85 = $68.00.
Question 7: Which of the following fractions lies between 1/3 and 1/2 on the number line?
- 1/4
- 2/5 (Correct answer)
- 3/5
- 2/7
Correct answer: 2/5
Converting to decimals: 1/3 ≈ 0.333, 1/2 = 0.500, and 2/5 = 0.400 falls between them.
NBT NBT Mathematics: Number Sense and Calculations 2
What is the value of 3/4 + 2/3?