f).-1,5:(-2 i 1/3)= -1 i 1/2:(-2 i 1/3)= -3/2:(-7/3)= -3/2*(-3/7)=9/14 g).-1 i 3/4+7 i 1/5= -1 i 15/20+7 i 4/20= -35/20+144/20=109/20=5 i 9/20 h).-2 i 3/8-1/12= -2 i 9/24-2/24= -2 i 11/24 i).-13,1-2,5= -15,6 j).17,21-20,03= -2,82 k).-0,82*(-0,3)=0,246 l).-0,75-(1 2/3)= -3/4-1 i 2/3= -3/4-5/3= -9/12-20/12= -29/12= -2 i 5/12
[latex]f) -1,5 : (-2 frac{1}{3} ) = -frac{3}{2}:(-frac{7}{3}) = -frac{3}{2}cdot (-frac{3}{7})= frac{9}{14}\ g) -1 frac{3}{4} + 7 frac{1}{5} = -frac{7}{4}+ frac{36}{5}= -frac{35}{20}+frac{144}{20}=frac{109}{20}=5frac{9}{20}\ h) -2 frac{3}{8} - frac{1}{12} = -2frac{9}{24}-frac{2}{24}=-2frac{11}{24}\ i) -13,1 - 2,5 = -15,6\ j) 17,21 - 20,03 = -2,82\ k) -0,82 cdot(-0,3) = -frac{82}{100}cdot (-frac{3}{10})=frac{246}{1000}=0,246\ [/latex] [latex]l) -0,75 - (1 frac{2}{3} ) =-frac{3}{4}-frac{5}{3} = -frac{9}{12} - frac{20}{12}=-frac{29}{12}= -2frac{5}{12}[/latex]