Question

Помогите пж...........​

Answer 1

$\frac{13}{50} +\frac{12}{50} +\frac{2}{50}=\frac{13+12+2}{50}=\frac{27}{50}\\\\\frac{56}{100} +\frac{15}{100} -\frac{9}{100} = \frac{56+15-9}{100} =\frac{71-9}{100}= \frac{62}{100}=\frac{62:2}{100:2}=\frac{31}{50} \\\\\frac{9}{25} +\frac{6}{25} +\frac{3}{25} =\frac{9+6+3}{25}=\frac{18}{25} \\\\(\frac{20}{45} +\frac{18}{45} )-\frac{29}{45}=\frac{20+18}{45}-\frac{29}{45}=\frac{38}{45}-\frac{29}{45}=\frac{38-29}{45}=\frac{9}{45}=\frac{9:9}{45:9}=\frac{1}{5}$