Question

Помогите срочно решить,даю 30 баллов ​

Answer 1

Покрокове пояснення:

1)

$4\frac{5}{9} + 7\frac{1}{6} = \frac{4 * 9 + 5}{9} + \frac{7 * 6 + 1}{6} = \frac{41 * 2}{9 * 2} + \frac{43 * 3}{6 * 3} = \frac{82}{18} + \frac{129}{18} = \frac{211}{18} = 11\frac{13}{18}$

2)

$6\frac{11}{12} + 8\frac{13}{18} = \frac{6 * 12 + 11}{12} + \frac{8 * 18 + 13}{18} = \frac{83 * 3}{12 * 3} + \frac{157 * 2}{18 * 2} = \frac{249}{36} + \frac{314}{36} = \frac{563}{36} = 15\frac{23}{36}$

3)

$12\frac{11}{12} - 5\frac{13}{18} = \frac{12 * 12 + 11}{12} - \frac{5 * 18 + 13}{18} = \frac{155 * 3}{12 * 3} - \frac{90 * 2}{18 * 2} = \frac{465}{36} - \frac{180}{36} = \frac{285 : 3}{36 : 3} = \frac{95}{12} = 7\frac{11}{12}$