Question

выполнить по заданию

Answer 1

30)
$frac{15}{4} times frac{6}{5} = frac{3 times 3}{2 times 1} = frac{9}{2} = 4 frac{1}{2}$
31)
$frac{3}{5} times frac{25}{4} = frac{3 times 5}{1 times 4} = frac{15}{4} = 3 frac{3}{4}$
32)
$frac{6}{5} div frac{4}{11} = frac{6}{5} times frac{11}{4} = frac{3 times 11}{5 times 2} = frac{33}{10} = 3 frac{3}{10}$
33)
$frac{12}{5} div frac{15}{2} = frac{12}{5} times frac{2}{15} = frac{4 times 2}{5 times 5} = frac{8}{25}$
34)
$frac{15}{4} div frac{3}{7} = frac{15}{4} times frac{7}{3} = frac{5 times 7}{4 times 1} = frac{35}{4} = 8 frac{3}{4}$
35)
$frac{9}{4} + frac{8}{5} = frac{45}{20} + frac{32}{20} = frac{77}{20} = 3 frac{17}{20}$
36)
$frac{11}{4} - frac{2}{5} = frac{55}{20} - frac{8}{20} = frac{47}{20} = 2 frac{7}{20}$
37)
$frac{1}{4} - frac{3}{25} = frac{25}{100} - frac{12}{100} = frac{13}{100}$