Odpowiedź:
a) skracasz 7 zostaje 1 i skracasz 14 zostaje 2
[tex]7 \times \frac{8}{14} = \frac{8}{2} = 4[/tex]
b) skracasz 15 zostaje 1 i skracasz 30 zostaje 2
[tex] \frac{20}{30} \times 15 = \frac{20}{2} = 10[/tex]
c) skracasz 33:11=3 11:11=1
[tex]33 \times \frac{4}{11} = \frac{3 \times 4}{1} = 12[/tex]
d) dzielisz 16:4=4 i 12:4=3
[tex] \frac{3}{12} \times 16 = \frac{3 \times 4}{3} = \frac{12}{3} = 4[/tex]
e) dzielisz 30:10=3 10:10=1
[tex]30 \times \frac{7}{10} = 3 \times 7 = 21[/tex]
f) dzielisz 33:11=3 22:11=2
[tex] \frac{6}{22} \times 33 = \frac{6}{2} \times 3 = \frac{6 \times 3}{2} = \frac{18}{2} = 9[/tex]
g) dzielisz 12:6=2 6:6=1
[tex]12 \times \frac{5}{6} = 2 \times 5 = 10[/tex]
h)
[tex] \frac{17}{20} \times 34 = \frac{17}{10} \times 17 = \frac{17 \times 17}{10} = \frac{289}{10} = 28.9[/tex]
i)
[tex]10 \times \frac{7}{15} = 2 \times \frac{7}{3} = \frac{2 \times 7}{3} = \frac{14}{3} = 4 \frac{2}{3} [/tex]
