Question

ДРОБИ
1)11 1/4+3 7/10

2)3 4/17-2 1/34

3)14 2/3+3 4/15

Найдите НОК

1)48 И 64; 180 и 270;25 и 75

Answer 1

$displaystyle 1) 11frac{1}{4} +3frac{7}{10} =11frac{5}{20} +3frac{14}{20}=14frac{19}{20} \\ 2)3frac{4}{17} -2frac{1}{34} =3frac{8}{34} -2frac{1}{34} =1frac{7}{34} \\ 3)14frac{2}{3} +3frac{4}{15} =14frac{10}{15} +3frac{4}{15} =17frac{14}{15}$

$48=2*2*2*2*3\ 64 = 2*2*2*2*2*2\ HOK(48,64)=2*2*2*2*2*2*3=192$

$180=2*2*3*3*5\ 270=2*3*3*3*5\ HOK(180,270)=2*2*3*3*3*5=540$

$25=5*5\ 75=3*5*5\ HOK(25,75)=3*5*5=75$