Question

2/5*4/7=
1/3*3*5=
4/9*5/12=
7/10*1/14=
14/15*1/7=
1/8*8/9=
3/5*5/3=
3/8*10/21=
5*1/3=
4/13*3=
5/21*3=
12*5/72=

Answer 1

Пошаговое объяснение:

2/5*4/7=8/35

1/3*3/5=1/5

4/9*5/12=5/27

7/10*1/14=1/20

14/15*1/7=2/15

1/8*8/9=1/9

3/5*5/3=1

3/8*10/21=5/28

5*1/3=5/3=1 2/3

4/13*3=12/13

5/21*3=5/7=1 2/7

12*5/72=5/6

Answer 2

Перемножаем всё что только возможно.

1) $\frac{2}{5} * \frac{4}{7} = \frac{8}{35}$

2) $\frac{1}{3} * \frac{3}{5} = \frac{1}{5} = 0,2$

3) $\frac{4}{9} * \frac{5}{12} = \frac{10}{27}$

4) $\frac{7}{10} * \frac{1}{14} = \frac{1}{20} = 0,05$

5) $\frac{14}{15} * \frac{1}{7} = \frac{2}{15}$

6) $\frac{1}{8} * \frac{8}{9} = \frac{1}{9}$

7) $\frac{3}{5} * \frac{5}{3} = 1$

8) $\frac{3}{8} * \frac{10}{21} = \frac{5}{28}$

9) $\frac{5}{1} * \frac{1}{3} = \frac{5}{3} = 1\frac{2}{3}$

10) $\frac{4}{13} * \frac{3}{1} = \frac{12}{13}$

11) $\frac{5}{21} * 3 = \frac{5}{7}$

12) $\frac{12}{1} * \frac{5}{72} = \frac{5}{6}$