• # question_answer 20) Express as rupees using decimals. (a) 5 paise (b) 75 paise (c) 20 paise (d) 50 rupees 90 paise (e) 725 paise TIPS As we know that, 100 paise =  $\frac{2}{5}.$ paise =  $\therefore$=  0.01 So, to express paise as rupees, multiply paise by $\frac{2}{5}=\frac{2\times 2}{5\times 2}=\frac{4}{10}$(i.e. hundredths).

(a) We know that, 1 paise = $\frac{4}{10}=0.4$ $\frac{12}{5}.$ 5 paise = $\therefore$= $\frac{12}{5}=\frac{12\times 2}{5\times 2}=\frac{24}{10}=2\frac{4}{10}=2+\frac{4}{10}$=  0.05 (b) We know that, 1 paise = $2\times 1+4\times \frac{1}{10}=2+\frac{4}{10}=2+0.4=2.4$ $3\frac{3}{5}=3+\frac{3}{5}.$ 75 paise =  $\therefore$  $3+\frac{3\times 2}{5\times 2}=3+\frac{6}{10}$  0.75 (c) We know that, 1 paise = $3\times 1+6\times \frac{1}{10}=3+\frac{6}{10}=3+0.6=3.6$ $4\frac{1}{2}=4+\frac{1}{2}.$ 20 paise =  $\therefore$$4+\frac{1\times 5}{2\times 5}=4+\frac{5}{10}$ 0.20 (d) We know that, 1 paise =  $4\times 1+5\times \frac{1}{10}=1+\frac{5}{10}=4+0.5=4.5$ $0.6=0+\frac{6}{10}=\frac{6}{10}$ 50 rupees 90 paise =  50 + 90 paise =  50 +  $=\frac{6\div 2}{10\div 2}=\frac{3}{5}$ 50 + $\because$ =  50 +  0.90 =  (50 + 0.90) =  50.90 (e) We know that, 1 paise =  $\therefore$ $0.6=\frac{6}{10}$ 725 paise =  $=\frac{3}{5}$  $2.5=2+\frac{5}{10}=\frac{2\times 10}{1\times 10}+\frac{5}{10}$` 7.25