Question

Помогите!!! Пожалуйста!!! Заранее Спасибо!!!

Answer 1

№5.

а)$2 frac{1}{4}-1 frac{1}{2} = 2 frac{1}{4}-1 frac{2}{4} = 1 frac{5}{4} -1 frac{2}{4} = frac{3}{4}=0,75$

б)$3 frac{4}{7} +1 frac{2}{3}= 3 frac{12}{21} +1 frac{14}{21} = 4frac{26}{21}=5 frac{5}{21}$

в)$2,5 + 1 frac{3}{40}=2 frac{5}{10} +1 frac{3}{40} = 2 frac{20}{40}+1frac{3}{40}= 3frac{23}{40}$

г)$frac{9}{32}* frac{4}{27}= frac{9*4}{32*27}= frac{1}{24}$

д)$8,5* frac{5}{17} =8 frac{1}{2}* frac{5}{17} = frac{17*5}{2*17} =2,5$

е)$5 frac{2}{3} *9= frac{17*9}{3}=51$

ё)$frac{7}{16}: frac{21}{32}= frac{7*32}{16*21} = frac{2}{3}$

ж)$2,7: frac{9}{14}= 2frac{7}{10} : frac{9}{14} = frac{27*14}{10*9}= 4frac{1}{5}= 4,2$

з)$2 frac{3}{7} : 51= frac{17}{7*51}= frac{1}{21}$

и)$2 frac{2}{3} : 5 frac{1}{5} = frac{8*5}{3*26} = frac{20}{39}$