17) $$3\frac{4}{9} \cdot 1\frac{19}{62} =$$ 18) $$1\frac{6}{49} \cdot 1\frac{23}{33} =$$ 19) $$4\frac{4}{15} \cdot 3\frac{3}{16} =$$ 20) $$6\frac{3}{4} \cdot 2\frac{1}{18} =$$

17) $$3\frac{4}{9} \cdot 1\frac{19}{62} = \frac{31}{9} \cdot \frac{81}{62} = \frac{31}{1} \cdot \frac{9}{62} = \frac{1}{1} \cdot \frac{9}{2} = \frac{9}{2} = 4\frac{1}{2}$$ 18) $$1\frac{6}{49} \cdot 1\frac{23}{33} = \frac{55}{49} \cdot \frac{56}{33} = \frac{5}{7} \cdot \frac{8}{3} = \frac{40}{21} = 1\frac{19}{21}$$ 19) $$4\frac{4}{15} \cdot 3\frac{3}{16} = \frac{64}{15} \cdot \frac{51}{16} = \frac{4}{5} \cdot \frac{17}{1} = \frac{68}{5} = 13\frac{3}{5}$$ 20) $$6\frac{3}{4} \cdot 2\frac{1}{18} = \frac{27}{4} \cdot \frac{37}{18} = \frac{3}{4} \cdot \frac{37}{2} = \frac{111}{8} = 13\frac{7}{8}$$