Răspuns:
Explicație pas cu pas:
[tex]a) \: 1.5 \times 3 = \frac{15 {}^{(5} }{10} \times 3 = \frac{3}{2} \times 3 = \frac{9}{2} \\ [/tex]
[tex]b) \: \frac{12}{15} \div \Big( - \frac{5}{3} \Big) = - \frac{12}{15} \times \frac{3}{5} = - \frac{36 {}^{(3} }{75} = - \frac{12}{25} \\ [/tex]
[tex]c) \: \Big(2 \frac{1}{3} \Big)^{2} = \Big( \frac{2 \times 3 + 1}{3} \Big)^{2} = \Big( \frac{7}{3} \Big) ^{2} = \frac{7 {}^{2} }{3 {}^{2} } = \frac{49}{9} \\ [/tex]
