Вариант 3
1. Найдите значение выражения:
- \( 4 \frac{1}{11} : 1 \frac{3}{22} = \frac{44+1}{11} : \frac{22+3}{22} = \frac{45}{11} : \frac{25}{22} = \frac{45}{11} \cdot \frac{22}{25} = \frac{45 \cdot 22}{11 \cdot 25} = \frac{9 \cdot 2}{1 \cdot 5} = \frac{18}{5} = 3.6 \)
- \( \frac{2}{5} : \frac{1}{15} = \frac{2}{5} \cdot 15 = \frac{2 \cdot 15}{5} = 2 \cdot 3 = 6 \)
- \( \frac{4.2}{25.2} = \frac{42}{252} = \frac{1}{6} \)
- \( \frac{1.56}{1 \frac{2}{6}} = \frac{1.56}{1 \frac{1}{3}} = \frac{1.56}{4/3} = 1.56 \cdot \frac{3}{4} = \frac{1.56 \cdot 3}{4} = \frac{4.68}{4} = 1.17 \)
Ответ: а) 3.6, б) 6, в) \( \frac{1}{6} \), г) 1.17.