Question

Как решить помогите пжжжж ❤️❤️

Answer 1

Ответ:

3. 2/3

Пошаговое объяснение:

1) 1. 3/4 * 2. 4/7 = 7/4 * 18/7 = 18/4 = 9/2

2) 9/2 : 4. 1/2 = 9/2 : 9/2 = 9/2 * 2/9 = 1

3) 2. 2/5 : 9/10 = 12/5 : 9/10 = 12/5 * 10/9 = 4/1 * 2/3 = 8/3 = 2. 2/3

4) 1 + 2. 2/3 = 3. 2/3

Answer 2

Ответ:

$1\dfrac{3}{4}\cdot2\dfrac{4}{7}:4\dfrac{1}{2}+2\dfrac{2}{5}:\dfrac{9}{10}=\dfrac{7}{4}\cdot\dfrac{18}{7}:\dfrac{9}{2}+\dfrac{12}{5}:\dfrac{9}{10}=\boxed{3\dfrac{2}{3.} }\\\\1)\ \dfrac{7}{4}\cdot\dfrac{18}{7}=\dfrac{9}{2};\\\\2)\ \dfrac{9}{2}:\dfrac{9}{2}=\dfrac{9}{2}\cdot\dfrac{2}{9}=1;\\\\3)\ \dfrac{12}{5}:\dfrac{9}{10}=\dfrac{12}{5}\cdot\dfrac{10}{9}=\dfrac{120}{45}=2\dfrac{30}{45}=2\dfrac{2}{3};\\\\4)\ 1+2\dfrac{2}{3}=3\dfrac{2}{3}.$