29 questions · self-marked practice — reveal the answer and mark yourself.
$\frac{5}{13}$ of 65
$\frac{1}{13} \times 65=55$ times of 5 is $5 \times 5=25$
$\frac{3}{8}$ of 64
$\frac{1}{8} \times 64=8,3$ times 8 is $3 \times 8=24$
$\frac{7}{11}$ of 22
$\frac{1}{11} \times 22=2$, seven times of 2 is $2 \times 7=14$
$\frac{2}{3}$ of 30
$\frac{1}{3} \times 30=10$, twice of 10 is $2 \times 10=20$
It means that $\frac{2}{3} \times 30=20$
20 rupees
30 km
15 litres
25 cm
30 km → $\frac{1}{5}$ of 30 = 6, 30 ÷ 5 = 6km.
15 litres → $\frac{1}{5}$ of 15 = 3, 15 ÷ 5 = 3 litres.
25 cm → $\frac{1}{5}$ of 25 = 5, 25 ÷ 5 = 5cm.
15 pencils
21 balloons
9 children
18 books
21 baloons → $\frac{1}{3}$ of 21 = 7,21 ÷ 3 = 7 baloons.
9 children → $\frac{1}{3}$ of 9 = 3, 9 ÷ 3 = 3
chi1dren. 18 books →$\frac{1}{3}$ of 18 = 6, 18 ÷ 3 = 6 books.
$\frac{10}{25}=\frac{10 \div 5}{25 \div 5}=\frac{2}{5}$
$\frac{9}{11}=\frac{9 \times 2}{11 \times 2}=\frac{18}{22}$
$\frac{10}{40}=\frac{10 \div 5}{40+5}=\frac{2}{8}$
$\frac{4 \div 2}{6 \div 2}=\frac{2}{3}$
$\frac{4}{20}=\frac{4 \div 4}{20 \div 4}=\frac{1}{5}$
$\therefore \frac{3}{4}=\frac{3 \times 5}{4 \times 5}=\frac{15}{20}$
$\frac{1}{2}=\frac{\square}{20}$
$\therefore \frac{1}{2}=\frac{1 \times 10}{2 \times 10}=\frac{10}{20}$