b)
[tex] \frac{7}{24} \times \frac{36}{56} = \frac{1}{2} \times \frac{3}{8} = \frac{3}{16} [/tex]
[tex] \frac{5}{24} \times 1 \frac{1}{5} = \frac{5}{24} \times \frac{6}{5} = \frac{1}{4} \times 1 = \frac{1}{4} [/tex]
[tex] \frac{7}{24} \div \frac{5}{36} = \frac{7}{24} \times \frac{36}{5} = \frac{7}{2} \times \frac{3}{5} = \frac{21}{10} = 2 \frac{1}{10} [/tex]
[tex] \frac{11}{26} \div 2 \frac{5}{24} = \frac{11}{26} \times \frac{24}{53 } = \frac{132}{689} [/tex]
Z. 5
12, 24, 36, 48, 60, 72 NWW(9,12) = 36
b)
1/9 + 5/12 = 4/36 + 15/36 = 19/36
7/9 - 1/12 = 28/36 - 3/36 = 25/36
Nie wiem jak zrobić te dwa ostatnie
