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- Hướng dẫn giải

a) (15, 37 – 12, 37) . 0,12 = 3. 0,12 = 0,36

b) $6\frac{5}{12}:2\frac{3}{4}+11\frac{1}{4}.\frac{1}{3}-\frac{1}{5}$$=\frac{77}{12}:\frac{11}{4}+\frac{45}{4}.\frac{2}{15}$$=\frac{77}{33}+\frac{3}{2}=\frac{23}{6}$