Question

5кл помогите пожалуйста дроби

Answer 1

$1) frac{5}{9} *4 = frac{5*4}{9} = frac{20}{9} = 2 frac{2}{9} \ \ 2) frac{a}{b} *c = frac{a*c}{b} \ \ 3) \ \ frac{7}{10} *30 = frac{7*30}{10} = frac{210}{10} = frac{21}{1} =21 \ \ frac{4}{15} *50 = frac{4*50}{15} = frac{200}{15} = frac{40}{3} = 13 frac{1}{3} \ \ 3* frac{5}{12} = frac{3*5}{12} = frac{5}{4} = 1 frac{1}{4} \ \ c* frac{a}{b} = frac{c*a}{b}$