$3.86 + 0.5 =$ $3.9\div10\% =$ $400\times0.9 =$
$0.78\div13 =$ $2.65\times0.3 =$ $305 + 405 =$
$25\times0.04 =$ $9\div3\% =$ $20\times0.16 =$
$0.72\div0.12 =$ $3.14\times0.4 =$ $3.15 - 0.09 =$
$1 - 44\% =$ $51\div34 =$ $\frac{4}{5}-\frac{4}{15}=$
$\frac{5}{8}\times\frac{2}{5}=$ $\frac{3}{4}-\frac{1}{6}=$ $\frac{9}{14}\times\frac{7}{45}=$
$\frac{1}{4}+\frac{3}{4}=$ $\frac{2}{5}\div\frac{5}{12}=$ $\frac{5}{6}+\frac{1}{3}=$
$\frac{13}{24}\div\frac{13}{18}=$ $\frac{2}{3}\times\frac{9}{16}=$ $\frac{11}{20}\div\frac{11}{15}=$
$3 + 20\% =$ $\frac{3}{2}-\frac{5}{4}=$ $\frac{3}{4}\div\frac{5}{6}=$
$\frac{5}{12}+\frac{1}{8}=$ $\frac{19}{20}\times\frac{10}{57}=$ $\frac{4}{7}-\frac{1}{3}=$

4.36 39 360
0.06 0.795 710
1 300 3.2
6 1.256 3.06
0.56 1.5 $\frac{8}{15}$
$\frac{1}{4}$ $\frac{7}{12}$ $\frac{1}{10}$
1 $\frac{24}{25}$ $\frac{7}{6}$
$\frac{3}{4}$ $\frac{3}{8}$ $\frac{3}{4}$
3.2 $\frac{1}{4}$ $\frac{9}{10}$
$\frac{13}{24}$ $\frac{1}{6}$ $\frac{5}{21}$

$\frac{4}{9}x+\frac{1}{3}x = 14$ $7.8:6 = 62.4:x$ $\frac{4}{5}:\frac{2}{15}=x:9$

$x = 18$ $x = 48$ $x = 54$