Question

помогите пожалуйста​

Answer 1

1. $frac{4}{11} * 1frac{21}{100} = frac{4}{11} * frac{121}{100} = frac{11}{25}$

2. $4frac{4}{7}-frac{3}{7} * (frac{5}{14}+frac{17}{21}) = frac{32}{7} - frac{3}{7} * (frac{5}{2*7} +frac{17}{3*7})= frac{32}{7}-frac{3}{7} *frac{3*5+17*2}{2*3*7} =$

$= frac{32}{7} -frac{3}{7} *frac{49}{42} = frac{32}{7}-frac{1}{2} =frac{32*2-1*7}{14} = frac{57}{14} = 4frac{1}{14}$

3. $4frac{5}{7}-2frac{2}{5} * 1frac{19}{36} - (frac{5}{12}+frac{13}{20} ) *frac{9}{16} = frac{47}{105}$

         ⁴      ²        ⁵        ¹        ³

1) $frac{5}{12} +frac{13}{20} = frac{5}{4*3} +frac{13}{4*5} = frac{5*5+13*3}{4*3*5} =frac{25+39}{60} = frac{64}{60} = 1 frac{4}{60} = 1 frac{1}{15}$

2) $2 frac{2}{5} * 1frac{19}{36} = frac{12}{5} * frac{55}{36} = frac{11}{3} = 3 frac{2}{3}$

3) $1 frac{1}{15} * frac{9}{16} = frac{16}{15} * frac{9}{16} = frac{3}{5}$

4)$4 frac{5}{7} - 3frac{2}{3} = frac{33}{7} - frac{11}{3} = frac{33*3-11*7}{3*7} = frac{99-77}{21} = frac{22}{21} = 1frac{1}{21}$

5) $1frac{1}{21} - frac{3}{5} = frac{22}{21} - frac{3}{5} = frac{22*5-3*21}{21*5} = frac{110-63}{105} = frac{47}{105}$

Answer 2

Сделай лучшим, пожалуйста