iGCSE Mathematics (0580) - C1.5 Ordering- Exam Style Questions Paper 3- New Syllabus
▶️ Answer/Explanation
(a)
(i) Compute the square root directly: $\sqrt{1.96} = 1.4$
(ii) Calculate the cube: $17 \times 17 \times 17 = 4913$
(iii) Multiply the two negative decimals (result will be positive): $-0.8 \times -1.2 = 0.96$
✅ Answers: (i) $1.4$, (ii) $4913$, (iii) $0.96$
(b)
Convert all numbers to decimals for easy comparison:
$\frac{11}{19} \approx 0.5789$
$58\% = 0.58$
$\frac{27}{47} \approx 0.5744$
$0.574$
Comparing these: $0.574 < 0.5744 < 0.5789 < 0.58$.
✅ Answer: $0.574 < \frac{27}{47} < \frac{11}{19} < 58\%$
▶️ Answer/Explanation
Convert everything to decimals or common denominators to easily compare them.
First, $\frac{2}{3} = 0.666…$, which is slightly less than 0.667.
Second, $\frac{1}{8}$ as a percentage is exactly 12.5%.
Third, $\frac{7}{8} = \frac{70}{80}$, which is less than $\frac{71}{80}$.
✅ Answer: <, =, <