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Bài 8:

a) 43:10 = 4(dư 3)

=> 4$\frac{3}{10}$ 

b) 17:2 = 8(dư 1)

=> 8$\frac{1}{2}$ 

c) 120:13 = 9(dư 3)

=> 9$\frac{3}{13}$ 

d) 112:21= 5(dư 7)

=>5$\frac{7}{21}$ 

e) -203:100 = 2(dư 3)

=>2$\frac{3}{100}$ 

f) -10:17 = -10(dư 17)

=> 0$\frac{-10}{17}$ 

Bài 9:

a) 5$\frac{1}{5}$ = $\frac{5.5+1}{5}$ = $\frac{26}{5}$ 

b) 9$\frac{1}{7}$ = $\frac{9.7+1}{7}$ = $\frac{64}{7}$ 

c) 5$\frac{2000}{2001}$ = $\frac{5.2000+2001}{2001}$ = $\frac{12001}{2001}$ 

d) -7$\frac{1981}{2006}$ = $\frac{-7.2006+1981}{2006}$ = $\frac{-12061}{2006}$ 

e) -2$\frac{2010}{2015}$ = $\frac{-2.2015+2010}{2015}$ = $\frac{-2020}{2015}$