Question

Calcule a diferença entre as frações:
1/3 – 4/5 =
​

Answer 1

$\Large\boxed{\begin{array}{l}\begin{array}{c|c}\sf3,5&\sf3\\\sf1,5&\sf5\\\sf1,1\end{array}\\\sf m\cdot m\cdot c\,(3,5)=3\cdot5=15\\\\\sf\dfrac{1}{3}-\dfrac{4}{5}=\dfrac{5}{15}-\dfrac{12}{15}=-\dfrac{7}{12}\end{array}}$