1) а) 17 34 б) 12:4 6) 6:3 13 г) 8:18; д) 2:1: 15 е) 1:11: 8 24 ж) 33:23: 9 з) 126:3. 7

Решение:

a) $$17 \frac{3}{4} = \frac{17 \cdot 4 + 3}{4} = \frac{68 + 3}{4} = \frac{71}{4} = 17.75$$

б) $$12 : \frac{1}{4} = 12 \cdot 4 = 48$$

в) $$\frac{6}{13} : 3 = \frac{6}{13} \cdot \frac{1}{3} = \frac{2}{13}$$

г) $$8:18 = \frac{8}{18} = \frac{4}{9}$$

д) $$\frac{2}{15} : 1 = \frac{2}{15}$$

e) $$\frac{1}{8} : 1 \frac{11}{24} = \frac{1}{8} : \frac{35}{24} = \frac{1}{8} \cdot \frac{24}{35} = \frac{3}{35}$$

ж) $$3 \frac{3}{9} : 2 \frac{2}{3} = 3 \frac{1}{3} : 2 \frac{2}{3} = \frac{10}{3} : \frac{8}{3} = \frac{10}{3} \cdot \frac{3}{8} = \frac{10}{8} = \frac{5}{4} = 1 \frac{1}{4} = 1.25$$

з) $$12 \frac{6}{7} : 3 = \frac{12 \cdot 7 + 6}{7} : 3 = \frac{84 + 6}{7} : 3 = \frac{90}{7} : 3 = \frac{90}{7} \cdot \frac{1}{3} = \frac{30}{7} = 4 \frac{2}{7}$$

Ответ:

а) 17.75

б) 48

в) 2/13

г) 4/9

д) 2/15

е) 3/35

ж) 1.25

з) 4 2/7