Question

выполните выражения.​

Answer 1

Ответ:

1) 27/8

2) 1/2

3) 1/6

4) 1

5) 3/10

Пошаговое объяснение:

$\frac{9*12*15}{6*8*10}=\frac{3*3*3}{2*2*2}=\frac{27}{8}$

$\frac{7*8+7*9}{17*14}=\frac{7*(8+9)}{17*2*7}=\frac{17}{17*2}=\frac{1}{2}$

$\frac{5*9-5*4}{15*10}=\frac{5*(9-4)}{5*3*2*5}=\frac{5*5}{5*3*2*5}=\frac{1}{6}$

$\frac{3*7+3*5}{4*9}=\frac{3*(7+5)}{36}=\frac{3*12}{3*12}=1$

$\frac{7*3-3*2}{5*7+5*3}=\frac{3*(7-2)}{5*(7+3}=\frac{3*5}{5*10}=\frac{3}{10}$

Answer 2

Пошаговое объяснение:

$\frac{9 \times 12 \times 15}{6 \times 8 \times 10} = \frac{9 \times 180}{6 \times 80} = \frac{1620}{480} = \frac{1620 \div 60}{480 \div 60} = \frac{27}{8} \\ \\ \frac{7 \times 8 + 7 \times 9}{17 \times 14} = \frac{56 + 63}{17 \times 14} = \frac{119}{238} = \frac{119 \div 119}{238 \div 119} = \frac{1}{2} \\ \\ \frac{5 \times 9 - 5 \times 4}{15 \times 10} = \frac{45 - 20}{150} = \frac{25}{150} = \frac{25 \div 25}{150 \div 25} = \frac{1}{6} \\ \\ \frac{3 \times 7 + 3 \times 5}{4 \times 9} = \frac{21 + 15}{4 \times 9} = \frac{36}{36} = 1 \\ \\ \frac{7 \times 3 - 3 \times 2}{5 \times 7 + 5 \times 3} = \frac{21 - 6}{35 + 15} = \frac{15}{50} = \frac{15 \div 5}{50 \div 5} = \frac{3}{10}$

__________________________

Удачи))