\frac{7}{9} + \frac{4}{9}=\frac{11}{9}=1\frac{2}{9}
\frac{2}{7} + \frac{5}{7}=\frac{2+5}{7}=\frac{7}{7}=1 treść działania źle wpisana ??
\frac{2}{5} + \frac{3}{5}=\frac{2+3}{5}=\frac{5}{5}=1 treść ??
1-\frac{3}{5}=\frac{5}{5}-\frac{3}{5}=\frac{2}{5}
1 - \frac{6}{11}=\frac{11}{11}-\frac{6}{11}=\frac{5}{11}
1 - \frac{19}{25}=\frac{25-19}{25}=\frac{6}{25}
\frac{4}{5} + \frac{2}{5}=\frac{6}{5}=1\frac{1}{5}=1,2
albo =0,8+0,4=1,2
\frac{3}{4} + \frac{3}{4}=\frac{3+3}{4}=\frac{6}{4}=1\frac{2}{4}=1\frac{1}{2}=1,5
albo =0,75+0,75=1,5
\frac{3}{4} - \frac{1}{2}=\frac{3}{4}-\frac{2}{4}=\frac{1}{4}=0,25
albo 0,75-0,5=0,24
8 - \frac{1}{4}=7\frac{4}{4}-\frac{1}{4}=7\frac{3}{4}=7,75
5 - \frac{3}{7}=4\frac{7}{7}-\frac{3}{7}=4\frac{4}{7}
10 - \frac{2}{5}=9\frac{5}{5}-\frac{2}{5}=9\frac{3}{5}=9,6
\frac{7}{9} - \frac{2}{9}=\frac{5}{9} treść ??
\frac{1}{5} - \frac{2}{5}=\frac{1-2}{5}=-\frac{1}{5} treść ??