Question

Выполните действие:
8/9 - 7/12;
11/50-3/25+1/20

Answer 1

11/50-3/25+1/20=3/20
 8/9 - 7/12=11/36

Answer 2

$frac{8}{9} - frac{7}{12} = frac{8*4}{9*4} - frac{7*3}{12*3} = frac{32}{36} - frac{21}{36} = frac{11}{36} \ \ frac{11}{50} - frac{3}{25} + frac{1}{20} = frac{11*2}{50*2} - frac{3*4}{25*4} + frac{1*5}{20*5} = frac{22}{100}- frac{12}{100} + frac{5}{100} = \ = frac{12-2+5}{100} = frac{15}{100} = frac{3}{20}$