Question

$\frac{1}{16} + \frac{3}{4} = \\ \\ \frac{9}{10} - \frac{3}{4} = \\ \\ 2 \frac{1}{3} + 3 \frac{1}{5} = \\ \\ 2 \frac{1}{15} - 1 \frac{3}{20} =$
$2 \frac{1}{3} + 3 \frac{1}{5} = \\ \\ 2 \frac{1}{15} - 1 \frac{3}{20} =$

Помогите решить !​

Answer 1

$\frac{1}{16} + \frac{3}{4} = \frac{1}{16} + \frac{3}{4} \times \frac{4}{4} = \frac{1+3*4}{16} = \frac{13}{16}$

$\frac{9}{10}- \frac{3}{4} = \frac{9}{10} \times \frac{2}{2} - \frac{3}{4} \times \frac{5}{5} = \frac{18 - 15}{20} = \frac{3}{20}$

$2 \frac{1}{3} + 3 \frac{1}{5} =5 + \frac{3 + 5}{3 \times 5} = 5 \frac{8}{15}$

$2 \frac{1}{15} - 1 \frac{3}{20} = 1 + \frac{4}{60} - \frac{9}{60} = 1 - \frac{5}{60} = \frac{12}{12} - \frac{1}{12} = \frac{11}{12}$

$2 \frac{1}{3} + 3 \frac{1}{5} =5 \frac{5 + 3}{15} = 5 \frac{8}{15}$

$2 \frac{1}{15} - 1 \frac{3}{20} = 1 + \frac{4}{60} - \frac{9}{60} = 1 - \frac{5}{60} = \frac{12}{12} - \frac{1}{12} = \frac{11}{12}$