Odpowiedź:
Zad 2
a)
[tex] \frac{2}{5} \times 20 = \frac{2}{5} \times \frac{20}{1} = \frac{2}{1} \times \frac{4}{1} = 8[/tex]
b)
[tex]3 \frac{3}{5} \times 10 = \frac{18}{5} \times \frac{10}{1} = \frac{18}{1} \times \frac{2}{1} = 36[/tex]
Zad 3
a)
[tex]30 \times \frac{3}{5} = \frac{30}{1} \times \frac{3}{5} = \frac{6}{1} \times \frac{3}{1} = 18[/tex]
b)
[tex]18 \times \frac{1}{6} = \frac{18}{1} \times \frac{1}{6} = \frac{3}{1} \times \frac{1}{1} = 3[/tex]
Zad 4
[tex] \frac{1}{4} \times 1 \frac{1}{3} = \frac{1}{4} \times \frac{4}{3} = \frac{1}{3} [/tex]
Odp: Do ciasta trzeba użyć 1/3 kg masła.
