1.
a)
[tex] \frac{12}{5} = 2 \frac{2}{5} [/tex]
[tex] \frac{9}{4} = 2 \frac{1}{4} [/tex]
b)
[tex]2 \frac{2}{3} = \frac{8}{3} [/tex]
[tex]2 \frac{4}{9} = \frac{22}{9} [/tex]
2.
a)
[tex] \frac{3}{5} + 1 \frac{4}{5} = 1 \frac{7}{5} = 2 \frac{2}{5} [/tex]
b)
[tex]1 \frac{1}{4} + 2 \frac{3}{5} = 1 \frac{5}{20} + 2 \frac{12}{20} = 3 \frac{17}{20} [/tex]
c)
[tex]1 \frac{3}{11} - \frac{6}{11} = \frac{14}{11} - \frac{6}{11} = \frac{8}{11} [/tex]
d)
[tex]5 \frac{5}{6} - 2 \frac{2}{3} = 5 \frac{5}{6} - 2 \frac{4}{6} = 3 \frac{1}{6} [/tex]
3.
a)
[tex]15 \times 4 \frac{2}{3} = \frac{15}{1} \times \frac{14}{3} = 5 \times 14 = 70[/tex]
b)
[tex]1 \frac{1}{3} \times 3 \frac{3}{4} = \frac{4}{3} \times \frac{15}{4} = \frac{1}{1} \times \frac{5}{1} = 5[/tex]
c)
[tex]3 \frac{3}{4} \div 12 = \frac{15}{4} \times \frac{1}{12} = \frac{5}{4} \times \frac{1}{4} = \frac{5}{16} [/tex]
d)
[tex]7 \frac{1}{3} \div 1\frac{4}{7} = \frac{22}{3} \div \frac{11}{7} = \frac{22}{3} \times \frac{7}{11} = \frac{2}{3} \times \frac{7}{1} = \frac{14}{3} = 4 \frac{2}{3} [/tex]
4.
[tex] \frac{3}{10} i \frac{3}{11} \\ \\ \frac{33}{110} > \frac{30}{110} [/tex]
Odpowiedź: Więcej zjadł Janek
