Question

$( \frac{9}{20} - \frac{1}{2} ) - \frac{5}{36} =$

Answer 1

Olá!

$( \frac{9}{20} - \frac{1}{2} ) - \frac{5}{36} = \frac{(9 \times 2 )- (20 \times 1)}{20 \times 2} - \frac{5}{36} = \\ \\ \frac{18 - 20}{40} - \frac{5}{36} = \\ \\ - \frac{2}{40} - \frac{5}{36} = \\ \\ - \frac{1}{20} - \frac{5}{36} = \\ \\ \frac{ - 36 - 100}{720} = \\ \\ \frac{ - 136}{720} = - \frac{68}{360} = - \frac{34}{180} = \\ \\ - \frac{17}{90}$


Espero ter ajudado!

bom dia !

Answer 2

Olá...

(9/20 - 1/2) - 5/36

9 - 10/20 - 5/36

- 1/20 - 5/36==>o mmc de (20,36) = 180

- 9 + 25/180

- 34/180 ÷ 2

- 17/90

Espero ter ajudado