1. Выполните сложение 1/6 + 1/9 = 5/12 + 4/15 = 3/8 + 5/16 = 1 1/4 + 2/3 =

Решение:

• \[ \frac{1}{6} + \frac{1}{9} = \frac{3}{18} + \frac{2}{18} = \frac{5}{18} \]
• \[ \frac{5}{12} + \frac{4}{15} = \frac{25}{60} + \frac{16}{60} = \frac{41}{60} \]
• \[ \frac{3}{8} + \frac{5}{16} = \frac{6}{16} + \frac{5}{16} = \frac{11}{16} \]
• \[ 1\frac{1}{4} + \frac{2}{3} = \frac{5}{4} + \frac{2}{3} = \frac{15}{12} + \frac{8}{12} = \frac{23}{12} = 1\frac{11}{12} \]

Ответ: 1) 5/18; 2) 41/60; 3) 11/16; 4) 1 11/12