Mathematics without a Calculator Flashcards
6 cards from real CAEC practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.
Read the first 6 Mathematics without a Calculator flashcards as text
What is 15% of 80?
Answer: 12
15% of 80 = 0.15 × 80 = 12. Or: 10% of 80 = 8; 5% of 80 = 4; total = 12.
Simplify the fraction 18/24.
Answer: 3/4
The GCF of 18 and 24 is 6. 18 ÷ 6 = 3; 24 ÷ 6 = 4. So 18/24 = 3/4.
What is 3/4 + 2/3?
Answer: 17/12
Convert to a common denominator of 12: 3/4 = 9/12 and 2/3 = 8/12. Sum = 17/12.
Which of the following is the correct order from least to greatest: 0.3, 1/4, 0.35, 2/5?
Answer: 1/4, 0.3, 0.35, 2/5
Convert all to decimals: 1/4=0.25, 0.3, 0.35, 2/5=0.40. Order: 0.25, 0.30, 0.35, 0.40 → 1/4, 0.3, 0.35, 2/5.
A number increased by 40% gives 84. What is the original number?
Answer: 60
If x × 1.40 = 84, then x = 84 ÷ 1.40 = 60.
What is the value of the expression 5 + 3 × (8 − 2) ÷ 6?
Answer: 8
Following BEDMAS: brackets first (8−2=6), then 3×6=18, then 18÷6=3, then 5+3=8.