Пошаговое объяснение:

[tex]1.a)5.6 > 5.49 \\ b)4.12 < 5[/tex]

[tex]2.a) \frac{27}{4} = 6 \frac{3}{4} \\ b)4 \frac{2}{3} = \frac{14}{3} [/tex]

[tex]3.a)4 \frac{2}{9} + 3 \frac{5}{9} = 7 \frac{7}{9} \\ b)6 \frac{4}{7} - 3 \frac{2}{7} = 3 \frac{2}{7} [/tex]

[tex]4. \: 7.82 + 9.6 + 4.18 = 21.6 \\ 21.6 \div 3 = 7.2[/tex]

[tex]5.(6 - 3.4) \times 1.7 + 1.44 \div 1.6 = 2.6 \times 1.7 + 1.44 \div 1.6 = 4.42 + 1.44 \div 1.6 = 4.42 + 0.9 = 5.32[/tex]

[tex]6. \: \: 7.2x - 5.4x + 0.55 = 1 \\ 1.8x + 0.55 = 1 \\ 1.8x = 1 - 0.55 \\ 1.8x = 0.45 \\ x = \frac{0.45}{1.8} \\ x = 0.25[/tex]

[tex]7. \: \: 4.2 \div 1.2 = 3.5 [/tex]

скорость вовчика

[tex]4.2 + 3.5 = 7.7[/tex]

общая скорость

[tex]7.7 \times 1.5 = 11.55 \: km[/tex]

расстояние

8. от 0 до 3