1019. a) 1 1/5 · 1 1/6; д) 1 1/2 · 1 1/3; б) 2 2/5 · 1 1/3; e) 2 1/2 · 1 1/5; в) 8 · 3 1/4; ж) 7 2/3 · 2 1/4;

a) $$1 \frac{1}{5} \cdot 1 \frac{1}{6} = \frac{6}{5} \cdot \frac{7}{6} = \frac{6 \cdot 7}{5 \cdot 6} = \frac{7}{5} = 1 \frac{2}{5}$$

д) $$1 \frac{1}{2} \cdot 1 \frac{1}{3} = \frac{3}{2} \cdot \frac{4}{3} = \frac{3 \cdot 4}{2 \cdot 3} = \frac{4}{2} = 2$$

б) $$2 \frac{2}{5} \cdot 1 \frac{1}{3} = \frac{12}{5} \cdot \frac{4}{3} = \frac{12 \cdot 4}{5 \cdot 3} = \frac{48}{15} = \frac{16}{5} = 3 \frac{1}{5}$$

e) $$2 \frac{1}{2} \cdot 1 \frac{1}{5} = \frac{5}{2} \cdot \frac{6}{5} = \frac{5 \cdot 6}{2 \cdot 5} = \frac{6}{2} = 3$$

в) $$8 \cdot 3 \frac{1}{4} = 8 \cdot \frac{13}{4} = \frac{8 \cdot 13}{4} = \frac{104}{4} = 26$$

ж) $$7 \frac{2}{3} \cdot 2 \frac{1}{4} = \frac{23}{3} \cdot \frac{9}{4} = \frac{23 \cdot 9}{3 \cdot 4} = \frac{207}{12} = \frac{69}{4} = 17 \frac{1}{4}$$

Ответ: a) $$1 \frac{2}{5}$$; д) $$2$$; б) $$3 \frac{1}{5}$$; e) $$3$$; в) $$26$$; ж) $$17 \frac{1}{4}$$