Question

quanto e 1/3-(1/4-2/3)

Answer 1

Eis uma das formas de resolver:

$\ \ \ \frac{1}{3} -(\frac{1}{4}- \frac{2}{3})\\ \\=\frac{1}{3} -(\frac{3}{12}- \frac{8}{12})\\ \\=\frac{1}{3} -(\frac{3-8}{12})\\ \\=\frac{1}{3} -(-\frac{5}{12})\\ \\=\frac{1}{3} +\frac{5}{12}=\\ \\=\frac{4}{12} +\frac{5}{12}=\\ \\=\frac{4+5}{12}\\ \\=\frac{9^{:3}}{12_{:3}}\\ \\=\frac{3}{4}$