a) 3/12-2/12=1/12 b) 9/30-2/30=7/30 c) 26/54-21/54=5/54 d) 35/40-14/40=21/40
[latex]a) frac{1}{4} - frac{1}{6} = frac{1*3}{4*3} - frac{1*2}{6*2} = frac{3}{12} -frac{2}{12}= frac{1}{12} \\ b) frac{3}{10} - frac{1}{15} = frac{3*3}{10*3} -frac{1*2}{15*2}= frac{9}{30} - frac{2}{30} = frac{7}{30} \\ c) frac{13}{27} - frac{7}{18} = frac{13*2}{27*2} - frac{7*3}{18*3} = frac{26}{54} - frac{21}{54} = frac{5}{54} \\ d) frac{7}{8} - frac{7}{20} = frac{7*5}{8*5} - frac{7*2}{20*2} = frac{35}{40} - frac{14}{40} = frac{21}{40} [/latex]
Sprowadz podane ułamki do najmniejszego wspólnego mianownika i oblicz ich różnice . a)1/4 i 1/6 b)3/10 i 1/15 c)13/27 i 7/18 d)7/8 i 7/20...
