Question

Пожалуйста..........​

Answer 1

а) 15/7:45/4
15*4/45*7
4/3*7=4/21
Б) 14/3:35/9
14*9/3*35
2*3/5= 1 1/5=1,2
В) 63/25:18/5
63*5/25*18
7/5*2
7/10=0,7

Answer 2

Ответ:

а)

$7 \frac{1}{2} \div 11 \frac{1}{4} = \frac{15}{2} \div \frac{45}{4} = \frac{15 \times 4}{2 \times 45} = \frac{2}{3}$

б)

$4 \frac{2}{3} \div 3 \frac{8}{9} = \frac{14}{3} \div \frac{35}{9} = \frac{14 \times 9}{3 \times 35} = \frac{2 \times 3}{5} = \frac{6}{5} = 1\frac{1}{5}$

в)

$2 \frac{13}{25} \div 3\frac{3}{5} = \frac{63}{25} \div \frac{18}{5} = \frac{63 \times 5}{25 \times 18 } = \frac{7}{5 \times 2} = \frac{7}{10}$