Question

resposta dessa simplificação



9/10-1/4​

Answer 1

$\Large\boxed{\begin{array}{l}\sf\dfrac{9}{10}-\dfrac{1}{4}=\dfrac{18-5}{20}=\dfrac{13}{20}\end{array}}$

Answer 2

$\frac{9}{10}-\frac{1}{4}\\\\=\frac{18}{20}-\frac{5}{20}\\\\\mathrm{Aplicar\:as\:propriedades\:das\:fracoes}:\\\\=\frac{18-5}{20}\\\\18-5=13\\\\=\frac{13}{20}$