1. **State the problem:** We are asked to work out the following calculations involving decimals and fractions. 2. **Calculate each part:** - a) $18 \times 0.01$ Multiply 18 by 0.01: $$18 \times 0.01 = 0.18$$ - b) $51.6 \times 0.1$ Multiply 51.6 by 0.1: $$51.6 \times 0.1 = 5.16$$ - c) $0.27 \div 0.1$ Divide 0.27 by 0.1: $$0.27 \div 0.1 = 2.7$$ - d) $3 \div 0.01$ Divide 3 by 0.01: $$3 \div 0.01 = 300$$ **Final answers:** a) 0.18 b) 5.16 c) 2.7 d) 300