a)
[tex] \frac{1}{3} + 0.25 = \frac{1}{3} + \frac{1}{4} = \frac{4}{12} + \frac{3}{12} = \frac{7}{12} [/tex]
b)
[tex]0.75 - \frac{4}{7} = \frac{3}{4} - \frac{4}{7} = \frac{21}{28} - \frac{16}{28} = \frac{5}{28} [/tex]
c)
[tex]4 \frac{1}{3} \div 0.26 = \frac{13}{3} \div \frac{26}{100} = \frac{13}{3} \times \frac{100}{26} = \frac{1}{3} \times \frac{100}{2} = \frac{100}{6} = 16 \frac{4}{6} = 16 \frac{2}{3} [/tex]
d)
[tex]3.6 \times 1 \frac{7}{9} = \frac{36}{10} \times \frac{16}{9} = \frac{4}{5} \times \frac{8}{1} = \frac{32}{5} = 6 \frac{2}{5} [/tex]
