Question

срочно 2 обведенных номера​

Answer 1

1118.

$frac{7}{20}*9+12*frac{7}{36}+1frac{8}{15}:4+frac{3}{5} :4frac{1}{2}=frac{7*9}{20}+frac{12*7}{36}+frac{23}{15}:4+frac{3}{5}:frac{9}{2}=\\=frac{63}{20} +frac{7}{3}+frac{23}{15*4}+frac{3}{5}*frac{2}{9}=frac{63}{20}+frac{7}{3}+frac{23}{60}+frac{2}{15}=frac{189}{60}+frac{140}{60}+frac{23}{60}+frac{8}{60} =frac{189+140+23+8}{60}=\\=frac{360}{60}=6$

1124.

$(frac{2}{7}:frac{3}{7}+(4frac{1}{2}-3frac{5}{6})*3frac{1}{3}):(6frac{1}{2}:9) =(frac{2}{3} +(frac{9}{2}-frac{23}{6})*frac{10}{3}) : (frac{13}{2}:9)=(frac{2}{3} + (frac{27}{6}-\\-frac{23}{6})*frac{10}{3}):frac{13}{18}= (frac{2}{3}+frac{2}{3}*frac{10}{3}):frac{13}{18} =(frac{2}{3}+frac{20}{9}):frac{13}{18}=(frac{6}{9}+frac{20}{9}) :frac{13}{18}=frac{26}{9}: frac{13}{18} =\\=frac{26*18}{9*13}=frac{2*2}{1} =4$