Question

Помогите решить:
1)7 4/21 + 2 1/6
2) 3 5/36 - 1 19/45

Answer 1

$7 frac{4}{21} +2 frac{1}{6}=7 frac{8}{42} +2 frac{7}{42}=9 frac{15}{42}= 9 frac{5}{14} \ \ 3 frac{5}{36} -1 frac{19}{45}= 3 frac{25}{180}-1 frac{76}{180}=2 frac{205}{180} - 1frac{76}{180} =1 frac{129}{180} =1 frac{43}{60}$