Question

efetue 2/5 + 9/10 - 1/2 ​

Answer 1

Olá!

$\frac{2}{5} + \frac{9}{10} - \frac{1}{2} = \\ \\ \frac{40 + 90 - 50}{100} = \\ \\ \frac{ {80}^{ \div 20} }{100} = \\ \\ \boxed{ \frac{4}{5} }$

Answer 2

2/5 + 9/10 - 1/2 =

13/10 - 1/2 =

4/5