Question

По могете с дробями 9\40+3\4-19\20

Answer 1

Общий знаменатель 40
 
9\40 + 3*10\4*10  - 19*2\20*2= 9\40+30\40 - 38\40=(9+30-38)\40=1\40

Answer 2

$\frac{9}{40} + \frac{3}{4}^{(10} - \frac{19}{20} = \frac{9+30}{40} - \frac{19}{20}^{(2} = \frac{39-38}{40} = \frac{1}{40}$