Question

8и2/3-6и3/5-2и2/5+1и7/9

Answer 1

8 2/3 - 6 3/5 - 2 2/5 + 1 7/9 = (8 2/3 + 1 7/9) - (6 3/5 + 2 2/5) = (8 6/9 + 1 7/9) - 9 = 10 4/9 - 9 = 1 4/9

Answer 2

$8 \frac{2}{3} -6 \frac{3}{5}-2 \frac{2}{5}+1 \frac{7}{9} = \frac{26}{3} - \frac{33}{5}- \frac{12}{5}+\frac{16}{9} =\frac{78}{9} - \frac{45}{5}+\frac{16}{9}=\\\\ =-9+ \frac{94}{9} = \frac{-81+94}{9} = \frac{13}{9}=1 \frac{4}{9}$