$0.48 + 5.62 =$ $5\% \div 5 =$ $8.1 \div 9 \times 2 =$
$\frac{18}{5} \times \frac{10}{3} =$ $4.25 - 3.45 =$ $3.6 \times 9 + 3.6 =$
$\frac{3}{4} + \frac{1}{3} =$ $1200 \times \frac{1}{4} =$ $24 \times (\frac{1}{3} - \frac{1}{6}) =$
$8 \times 0.35 =$ $\frac{1}{3} \div 6 =$ $\frac{2}{5} + \frac{3}{5} \times 2 =$
$1 - 12\% =$ $\frac{4}{3} \times \frac{5}{16} =$ $2.8 + 1.63 + 3.2 =$
$\frac{4}{15} \times \frac{3}{20} =$ $\frac{2}{5} \div \frac{1}{20} =$ $(\frac{1}{4} + \frac{2}{5}) \times 20 =$
$6 \div 10\% =$ $5 \times 20\% =$ $76 \div 2.5 \div 4 =$
$50.24 \div 3.14 =$ $\frac{1}{20} + \frac{1}{10} =$ $2.7 - 0.9 + 2.3 =$
$\frac{9}{26} \times \frac{13}{18} =$ $6.8 \div 0.17 =$ $15 \times \frac{3}{5} \div \frac{3}{5} \times \frac{2}{3} =$
$\frac{4}{15} \div \frac{7}{15} =$ $\frac{11}{13} \times \frac{3}{22} =$ $1 - 5\% \times \frac{2}{5} =$

6.1 0.01 1.8
12 0.8 36
$\frac{13}{12}$ 300 4
2.8 $\frac{1}{18}$ $\frac{8}{5}$
0.88 $\frac{5}{12}$ 7.63
$\frac{1}{25}$ 8 13
60 1 7.6
16 $\frac{3}{20}$ 4.1
$\frac{1}{4}$ 40 10
$\frac{4}{7}$ $\frac{3}{26}$ $\frac{49}{50}$

$3.6 : x = 120 : 500$ $\frac{3}{4} : \frac{6}{7} = x : \frac{12}{5}$ $1.8x - 4 \times 1.5 = 6.6$

$x = 15$ $x = \frac{21}{10}$ $x = 7$