Question

Пример.



$frac{11}{15}$ - $frac{3}{10}$ + $frac{1}{45}$

Answer 1

11/15(умножаем на 6)-3/10(умножаем на 9)+1/45(умножаем на 2)=66/90-27/90+2/90=41/90

Answer 2

$frac{11}{15} - frac{3}{10} + frac{1}{45} = frac{11*6}{15*6} - frac{3*9}{10*9} + frac{1*2}{45*2}= frac{66}{90} - frac{27}{90} + frac{2}{90} = frac{66-27+2}{90} = frac{41}{90}$