Cách làm cho bạn:
a. $\frac{5}{4}+\frac{12}{16}$
$\frac{5}{4}+\frac{12}{16}= \frac{5}{4}+\frac{12:4}{16:4}=\frac{5}{4}+\frac{3}{4}=\frac{8}{4}$
b. $\frac{5}{6}+\frac{4}{24}$
$\frac{5}{6}+\frac{4}{24}= \frac{5}{6}+\frac{4:4}{24:4}=\frac{5}{6}+\frac{1}{6}=\frac{6}{6}$
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