Відповідь:

[tex] 1)\frac{16}{30} [/tex]

[tex]2)3 \frac{2}{7} [/tex]

[tex]3) \frac{2}{45} [/tex]

[tex]4)1 \frac{7}{30} [/tex]

Пояснення:

[tex]1)0.2 + \frac{1}{3} = \frac{2}{10} + \frac{1}{3} = \frac{6}{30 } + \frac{10}{30} = \frac{16}{30} [/tex]

[tex]2) \frac{1}{2} + 2 \frac{2}{7} + 0.5 = \frac{1}{2} + 2 \frac{2}{7} + \frac{5}{10} = \frac{35}{70} + 2 \frac{20}{70} + \frac{35}{70} = 2 \frac{90}{70} = 3 \frac{20}{70} = 3 \frac{2}{7} [/tex]

[tex]3) \frac{4}{9} - 0.4 = \frac{4}{9} - \frac{4}{10} = \frac{40}{90} - \frac{36}{90} = \frac{4}{90} \div 2 = \frac{2}{45} [/tex]

[tex]4)3 \frac{5}{6} - 2.6 = 3 \frac{5}{6} - 2 \frac{6}{10} = 3 \frac{25}{30} - 2 \frac{18}{30} = 1 \frac{7}{30} [/tex]