a) [tex] (\frac{10}{3} + 5 - 2) \times \frac{1}{15} \times \frac{2}{7} \\ = ( \frac{10}{ 3} + 3 )\times \frac{1}{15} \times \frac{2}{7} \\ = \frac{19}{3} \times \frac{1}{15} \times \frac{2}{7} \\ = \frac{38}{315} [/tex]
b) (8-2/9) × 1/4×5/6+29/4
70/9×1/4×5/6+29/4
175/108+29/4
479/54
