Odpowiedź:
Zad 15
a)
[tex]\frac{30}{102} =\frac{15}{51} =\frac{5}{17}[/tex]
b)
[tex]\frac{54}{252} =\frac{9}{42} =\frac{3}{14}[/tex]
c)
[tex]\frac{27}{18} =\frac{3}{2}[/tex]
d)
[tex]\frac{18}{12} =\frac{3}{2}[/tex]
Zad 16
a)
[tex]3\frac{1}{5} =\frac{16}{5}[/tex]
b)
[tex]8\frac{2}{7} =\frac{58}{7}[/tex]
c)
[tex]10\frac{1}{3} =\frac{31}{3}[/tex]
d)
[tex]20\frac{2}{3} =\frac{62}{3}[/tex]
Zad 17
a)
[tex]6mm = \frac{6}{10} cm[/tex]
b)
2kg i 8 dag = 2000g + 80g = 2080g = [tex]\frac{2080}{1000}kg =\frac{208}{100}kg =\frac{52}{25} kg=2,08kg[/tex]
c)
2 godz. i 10 min. = [tex]2\frac{1}{6}[/tex] godz.
Zad 18
a)
[tex]\frac{16}{5} =3\frac{1}{5}[/tex]
b)
[tex]\frac{25}{9} =2\frac{7}{9}[/tex]
c)
[tex]\frac{47}{10} =4\frac{7}{10}[/tex]
d)
[tex]\frac{745}{100} =7\frac{45}{100}[/tex]
Zad 19
[tex]4\frac{2}{5} =\frac{22}{5}[/tex]
Odwrotność liczby [tex]4\frac{2}{5}[/tex] to [tex]\frac{5}{22}[/tex]
Zad 20
Połowa liczby [tex]\frac{4}{7}[/tex] to [tex]\frac{4}{7} *\frac{1}{2} =\frac{4}{14} =\frac{2}{7}[/tex]
