Д/З №1 Сократите дроби: E)H) 3.22 C) 11.45 16-45-19 81-57-4 щ) 3-14-62 31-10-27 №2 Вычисли: 5 1) 7-6 99 6 2) 2 +455 56 56 3) 3-4 4) 14-135)5-2

№1 Сократите дроби:

• E)H) $$\frac{3 \cdot 22}{11 \cdot 45} = \frac{3 \cdot 2 \cdot 11}{11 \cdot 3 \cdot 3 \cdot 5} = \frac{2}{15}$$
• C) $$\frac{16 \cdot 45 \cdot 19}{81 \cdot 57 \cdot 4} = \frac{4 \cdot 4 \cdot 5 \cdot 9 \cdot 19}{9 \cdot 9 \cdot 3 \cdot 19 \cdot 4} = \frac{4 \cdot 5}{9 \cdot 3} = \frac{20}{27}$$
• Щ) $$\frac{3 \cdot 14 \cdot 62}{31 \cdot 10 \cdot 27} = \frac{3 \cdot 2 \cdot 7 \cdot 2 \cdot 31}{31 \cdot 2 \cdot 5 \cdot 3 \cdot 9} = \frac{2 \cdot 7}{5 \cdot 9} = \frac{14}{45}$$

№2 Вычисли:

1. $$7\frac{5}{99} - 6\frac{6}{99} = 7\frac{5}{99} - 6\frac{6}{99} = (7-6) + (\frac{5}{99} - \frac{6}{99}) = 1 - \frac{1}{99} = \frac{99}{99} - \frac{1}{99} = \frac{98}{99}$$
2. $$2\frac{5}{56} + 4\frac{55}{56} = (2+4) + (\frac{5}{56} + \frac{55}{56}) = 6 + \frac{60}{56} = 6 + \frac{15}{14} = 6 + 1\frac{1}{14} = 7\frac{1}{14}$$
3. $$3 - \frac{3}{4} = \frac{3}{1} - \frac{3}{4} = \frac{3 \cdot 4}{1 \cdot 4} - \frac{3}{4} = \frac{12}{4} - \frac{3}{4} = \frac{9}{4} = 2\frac{1}{4}$$
4. $$14 - 13\frac{3}{27} = 14 - 13\frac{1}{9} = 13\frac{9}{9} - 13\frac{1}{9} = (13-13) + (\frac{9}{9} - \frac{1}{9}) = \frac{8}{9}$$
5. $$5\frac{3}{17} - 2\frac{15}{17} = 4\frac{20}{17} - 2\frac{15}{17} = (4-2) + (\frac{20}{17} - \frac{15}{17}) = 2 + \frac{5}{17} = 2\frac{5}{17}$$

Ответ: