2$\frac{1}{3}$ + 1$\frac{1}{6}$
= $\frac{7}{3}$ + $\frac{7}{6}$
= $\frac{21}{6}$
= $\frac{7}{2}$
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3$\frac{1}{2}$ - 1$\frac{3}{5}$
= $\frac{7}{2}$ - $\frac{8}{5}$
= $\frac{19}{10}$
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2$\frac{1}{4}$ × 3$\frac{2}{5}$
= $\frac{9}{4}$ x $\frac{17}{5}$
= $\frac{153}{20}$
Cho mik xin câu tl hay nhất nha