Răspuns:
[tex]a) \: 7 + \frac{3}{4} - 0.75 = 7 \div + \frac{3}{4} - \frac{75}{100} = \\ 7 + \frac{3}{4} - \frac{3}{4} = 7[/tex]
[tex]b) \: 5 \times 1.2 + \frac{1}{2} + \frac{2}{5} = \\ 5 \times \frac{12}{10} + \frac{5}{10} + \frac{4}{10} = \\ \frac{60}{10} + \frac{9}{10} = \frac{69}{10} [/tex]
[tex]e) \: 0.2 \times (3.5 + 2.6) = 0.2 \times 6.1 = 1.22[/tex]
[tex]f) \: (12.3 + 5.06) \times 5 = 17.36 \times 5 = 86.8[/tex]
