zad.12 Piszę te liczby, które trzeba wpisać w kwadraty a) 15 (105:7*1) b) 60 (72:6*5) c) 18 d) 165 (121:11*15) zad.13 a) > b) < c) < d) < zad.14 b) = [latex] frac{25}{35} + frac{49}{35} = frac{74}{35} = 2 frac{4}{35} [/latex] TAK c) = [latex] frac{9}{8} + frac{6}{8} = frac{15}{8} = 1 frac{7}{8} [/latex] TAK d) = [latex] frac{7}{6} + frac{2}{9} = frac{21}{18} + frac{4}{18} = frac{25}{18} = 1 frac{7}{18} [/latex] NIE zad.15 a) [latex] frac{3}{4} - frac{2}{3} =frac{9}{12} - frac{8}{12} = frac{1}{12}[/latex] TAK b) [latex]frac{9}{7} - frac{7}{9} = frac{81}{49} - frac{49}{63} = frac{32}{63} = 1frac{31}{63}[/latex] NIE c) [latex]2frac{3}{5} - frac{16}{7} = frac{13}{5} - frac{16}{7} = frac{91}{35} - frac{80}{35}= frac{11}{35}[/latex] TAK d) [latex]frac{23}{5} - 3frac{5}{6} = frac{23}{5} - frac{23}{5} = 0[/latex] TAK zad.16 a) [latex]2frac{2}{3} - 5frac{1}{4} + 0,75 = frac{8}{3} - frac{21}{4} + frac{3}{4} = frac{32}{12} - frac{63}{12} + frac{9}{12} = -frac{22}{12}= - 1frac{5}{6}[/latex] b) [latex]1frac{7}{12} + 1 frac{5}{6} - frac{1}{2} : frac{2}{3} = frac{19}{12} + frac{11}{6} - frac{1}{2} * frac{3}{2} = frac{19}{12} + frac{22}{12} - frac{3}{4} = frac{41}{12} - frac{9}{12} = frac{32}{12} = 2frac{2}{3}[/latex] c) [latex]-3,625 - 7frac{3}{4} + 3frac{1}{2} : (-1frac{1}{3}) = -3frac{5}{8} - frac{31}{4} +frac{7}{2} : (-frac{4}{3}) = -frac{29}{8} - frac{62}{8} + [/latex][latex]frac{7}{2} *(-frac{3}{4}) = - frac{91}{8} - frac{21}{8} = - frac{112}{8} = -14[/latex]
