1. The problem asks us to perform arithmetic operations on numbers and round the results to a specified number of decimal places (dp). 2. (1) Convert 21.17874 to 3dp. Round 21.17874 to 3 decimal places: $$21.179$$ 3. (3) Convert 15.0998 to 2dp. Round 15.0998 to 2 decimal places: $$15.10$$ 4. (5) Find the value of $$\frac{2.1947}{15.1478}$$ and round to 2dp. Calculate: $$\frac{2.1947}{15.1478} \approx 0.1449$$ Rounded to 2dp: $$0.14$$ 5. (7) Calculate $$\frac{22.83}{15.2} \times 16.7$$ and round to 3dp. First, compute $$\frac{22.83}{15.2} \approx 1.5020$$ Then multiply: $$1.5020 \times 16.7 = 25.7334$$ Rounded to 3dp: $$25.733$$ 6. (9) Calculate $$\frac{14.21 \times 22.84}{7.84 \times 3.213}$$ and round to 2dp. Calculate numerator: $$14.21 \times 22.84 = 324.5564$$ Calculate denominator: $$7.84 \times 3.213 = 25.1819$$ Divide: $$\frac{324.5564}{25.1819} \approx 12.884$$ Rounded to 2dp: $$12.88$$ Final answers: (1) 21.179 (3) 15.10 (5) 0.14 (7) 25.733 (9) 12.88