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8.8 120 kg - 45 [latex] frac{3}{5} [/latex] kg - 45 [latex]frac{3}{5}[/latex] kg + 6 [latex] frac{2}{5} [/latex] kg= 35 [latex] frac{1}{5} [/latex] 8.9. 21 [latex]frac{1}{10}[/latex] - 13 [latex] frac{4}{10} [/latex] - 2*2 [latex] frac{6}{10} [/latex] = 6 [latex] frac{7}{10} [/latex] - 5 [latex] frac{2}{10} [/latex] = 1 [latex] frac{5}{10} [/latex] = 1 [latex] frac{1}{2} [/latex] 9.1 7 [latex] frac{11}{12} [/latex] + 7 [latex] frac{11}{12} [/latex] + 4 [latex] frac{7}{12} [/latex] = 20 [latex] frac{5}{12} [/latex]

8.8 [latex]45 frac{3}{5} - 6 frac{2}{5} = 39 frac{1}{5} \ 39 frac{1}{5}+45 frac{3}{5}= 84 frac{4}{5} \ 120-84 frac{4}{5} = 25 frac{1}{5} [/latex] 8.9 [latex]2 frac{6}{10} = 2,6m \ 13 frac{4}{10} = 13,4\ 2/6*2=5,2m \ 5,2+13,4=18,6m \ 21,1-18,6=1,5m \ Odp. Chodnik ma 1,5m[/latex] 8.10 [latex]7 frac{11}{12} + 4 frac{7}{12} =12 frac{6}{12} \ 12 frac{6}{12} +7 frac{11}{12} = 20 frac{5}{12} [/latex]