Question

2/3+1/4+1/5

Найти сумму

Answer 1

$frac{2}{3}+ frac{1}{4}+ frac{1}{5} = frac{4*2+3*1}{12} + frac{1}{5}= frac{11}{12}+ frac{1}{5}= frac{11*5+12*1}{60} = frac{67}{60} =1 frac{7}{60}$

Answer 2

2/3+1/4+1/5=1 7/60

1) 2/3+1/4=8/12+3/12=11/12

2) 11/12+1/5=55/60+12/60=67/60=1 7/60