1. Let's solve each problem step-by-step. 2. For c) $1.68 \div 0.7$: - Division of decimals can be simplified by multiplying numerator and denominator by 10 to remove decimals: $$\frac{1.68}{0.7} = \frac{1.68 \times 10}{0.7 \times 10} = \frac{16.8}{7}$$ - Now divide 16.8 by 7: $$16.8 \div 7 = 2.4$$ 3. For d) $9.52 \div 2.8$: - Similarly, multiply numerator and denominator by 10: $$\frac{9.52}{2.8} = \frac{9.52 \times 10}{2.8 \times 10} = \frac{95.2}{28}$$ - Now divide 95.2 by 28: $$95.2 \div 28 = 3.4$$ 4. For $\sqrt{1.68}$: - The square root symbol $\sqrt{}$ means a number which when multiplied by itself gives the operand. - Using a calculator or approximation: $$\sqrt{1.68} \approx 1.296$$ 5. For $\sqrt{8.52}$: - Similarly: $$\sqrt{8.52} \approx 2.92$$ **Final answers:** - c) $1.68 \div 0.7 = 2.4$ - d) $9.52 \div 2.8 = 3.4$ - $\sqrt{1.68} \approx 1.296$ - $\sqrt{8.52} \approx 2.92$