Question

Помогитеее пжжжжжжжжжжжж

Answer 1

Ответ:

$1) 2\frac{1}{7} (3+\frac{6}{5})=\frac{15}{7} (\frac{15}{5} +\frac{6}{5})=\frac{15}{7} *\frac{21}{5}=3*3=9$

$2) (0.25+1\frac{1}{2}):\frac{55}{7}*\frac{11}{7}=(\frac{1}{4}+\frac{3*2}{4}):\frac{55}{7}*\frac{11}{7}=\frac{7}{4}*\frac{7}{55}*\frac{11}{7}=\frac{7*1}{5*4}=\frac{7 }{20}$

$3) 3.5*(2\frac{1}{7} -1\frac{1}{5})=3.5*( \frac{15}{7} - \frac{6}{5})=3.5*(\frac{15*5-6*7}{35})=3.5*\frac{33}{35} =\frac{35}{10}* \frac{33}{35}=3.3$

$4) (0.3-\frac{3}{20} )*1\frac{1}{2} =(\frac{6}{20} -\frac{3}{20} )*\frac{3}{2} =\frac{3}{20}*\frac{3}{2}=\frac{9}{40}$

Пошаговое объяснение: