Question

Срочнооооооооо !!!!!! Только а) пжжжжжж

Answer 1

$(3 frac{7}{30} -1 frac{5}{12} ):18 frac{1}{16} = frac{436}{4335} \ \ 1)~3 frac{7}{30} -1 frac{5}{12}= frac{3*30+7}{30}- frac{1*12+5}{12} = frac{97}{30} -frac{17}{12} = frac{97*2}{30*2} -frac{17*5}{12*5} = frac{194}{60}-frac{85}{60}= \ =frac{194-85}{60}=frac{109}{60} \ 2)~frac{109}{60}:18 frac{1}{16}=frac{109}{60}: frac{18*16+1}{16}=frac{109}{60}: frac{289}{16}=frac{109}{15*4}* frac{4*4}{289}= frac{109}{15}* frac{4}{289}= \ = frac{109*4}{15*289}= frac{436}{4335}$