1) Выполните умножение: 3x22 1145 12 14 2) x= 7 27 18 13 3) X 39 36 24 51 4) 17 X-= 40 1 1 5) 12x316 7 1 6)×1= 2 9 2 7)4×8= 5 6 2 X 8) = x 14 =

1) $$ \frac{3}{11} \times \frac{22}{45} = \frac{3 \times 22}{11 \times 45} = \frac{3 \times 2 \times 11}{11 \times 3 \times 15} = \frac{2}{15} $$

Ответ: 2/15

2) $$ \frac{12}{7} \times \frac{14}{27} = \frac{12 \times 14}{7 \times 27} = \frac{4 \times 3 \times 2 \times 7}{7 \times 9 \times 3} = \frac{8}{9} $$

Ответ: 8/9

3) $$ \frac{18}{39} \times \frac{13}{36} = \frac{18 \times 13}{39 \times 36} = \frac{2 \times 9 \times 13}{3 \times 13 \times 4 \times 9} = \frac{2}{3 \times 4} = \frac{1}{6} $$

Ответ: 1/6

4) $$ \frac{24}{17} \times \frac{51}{40} = \frac{24 \times 51}{17 \times 40} = \frac{8 \times 3 \times 3 \times 17}{17 \times 8 \times 5} = \frac{9}{5} $$

Ответ: 9/5

5) $$ 1 \frac{1}{7} \times 3 \frac{1}{16} = \frac{8}{7} \times \frac{49}{16} = \frac{8 \times 49}{7 \times 16} = \frac{8 \times 7 \times 7}{7 \times 8 \times 2} = \frac{7}{2} $$

Ответ: 7/2

6) $$ \frac{2}{9} \times 1 \frac{1}{2} = \frac{2}{9} \times \frac{3}{2} = \frac{2 \times 3}{9 \times 2} = \frac{1}{3} $$

Ответ: 1/3

7) $$ 4 \frac{1}{6} \times 8 \frac{2}{5} = \frac{25}{6} \times \frac{42}{5} = \frac{25 \times 42}{6 \times 5} = \frac{5 \times 5 \times 7 \times 6}{6 \times 5} = 35 $$

Ответ: 35

8) $$ \frac{2}{7} \times 14 = \frac{2 \times 14}{7} = \frac{2 \times 2 \times 7}{7} = 4 $$

Ответ: 4