• Brüche kürzen II
  • MNWeG
  • 17.05.2019
  • Mathematik
  • Bruchrechnen
  • R
  • 5
  • Einzelarbeit
  • Arbeitsblatt
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1
Welche Zahlen fehlen noch? Kürze richtig und trage die fehlenden Zahlen in die Lücken ein.
Aber aufgepasst: Bei einer Aufgabe hat sich ein Fehler eingeschlichen. Welcher Bruch lässt sich nicht weiter kürzen?

2

3

6

1

3

5

15

5

5

2

x

2

x

4

2

x

2
Wie weit kannst du kürzen? Finde die größtmögliche Zahl mit der du den Bruch kürzen kannst.

  • \gdef\cloze#1{\colorbox{none}{\color{transparent}{\large{$\displaystyle #1$}}}} \hspace*{0.2cm} 10:20:\gdef\cloze#1{\colorbox{none}{\color{transparent}{\large{$\displaystyle #1$}}}} \dfrac{10 :}{20 :} \gdef\cloze#1{\colorbox{none}{\color{transparent}{\large{$\displaystyle #1$}}}} \hspace*{0.3cm} \gdef\cloze#1{\colorbox{none}{\color{transparent}{\large{$\displaystyle #1$}}}} \hspace*{0.55cm}=\gdef\cloze#1{\colorbox{none}{\color{transparent}{\large{$\displaystyle #1$}}}} \hspace*{0.4cm} 12\gdef\cloze#1{\colorbox{none}{\color{transparent}{\large{$\displaystyle #1$}}}} \dfrac{1}{2}



  • \gdef\cloze#1{\colorbox{none}{\color{transparent}{\large{$\displaystyle #1$}}}} \hspace*{0.2cm} 3:9:\gdef\cloze#1{\colorbox{none}{\color{transparent}{\large{$\displaystyle #1$}}}} \dfrac{3 :}{9 :} \gdef\cloze#1{\colorbox{none}{\color{transparent}{\large{$\displaystyle #1$}}}} \hspace*{0.3cm} \gdef\cloze#1{\colorbox{none}{\color{transparent}{\large{$\displaystyle #1$}}}} \hspace*{0.7cm} =\gdef\cloze#1{\colorbox{none}{\color{transparent}{\large{$\displaystyle #1$}}}} \hspace*{0.4cm}13\gdef\cloze#1{\colorbox{none}{\color{transparent}{\large{$\displaystyle #1$}}}} \dfrac{1}{3}



  • \gdef\cloze#1{\colorbox{none}{\color{transparent}{\large{$\displaystyle #1$}}}} \hspace*{0.2cm} 10:25:\gdef\cloze#1{\colorbox{none}{\color{transparent}{\large{$\displaystyle #1$}}}} \dfrac{10 :}{25 :} \gdef\cloze#1{\colorbox{none}{\color{transparent}{\large{$\displaystyle #1$}}}} \hspace*{0.3cm} \gdef\cloze#1{\colorbox{none}{\color{transparent}{\large{$\displaystyle #1$}}}} \hspace*{0.5cm} =\gdef\cloze#1{\colorbox{none}{\color{transparent}{\large{$\displaystyle #1$}}}} \hspace*{0.4cm}25\gdef\cloze#1{\colorbox{none}{\color{transparent}{\large{$\displaystyle #1$}}}} \dfrac{2}{5}



  • \gdef\cloze#1{\colorbox{none}{\color{transparent}{\large{$\displaystyle #1$}}}} \hspace*{0.2cm} 14:18:\gdef\cloze#1{\colorbox{none}{\color{transparent}{\large{$\displaystyle #1$}}}} \dfrac{14 :}{18 :} \gdef\cloze#1{\colorbox{none}{\color{transparent}{\large{$\displaystyle #1$}}}} \hspace*{0.3cm} \gdef\cloze#1{\colorbox{none}{\color{transparent}{\large{$\displaystyle #1$}}}} \hspace*{0.5cm} =\gdef\cloze#1{\colorbox{none}{\color{transparent}{\large{$\displaystyle #1$}}}} \hspace*{0.4cm}79\gdef\cloze#1{\colorbox{none}{\color{transparent}{\large{$\displaystyle #1$}}}} \dfrac{7}{9}


10

Wie weit kann man kürzen?


Man kann den Bruch 1020\gdef\cloze#1{\colorbox{none}{\color{transparent}{\large{$\displaystyle #1$}}}} \dfrac{10}{20} beispielsweise mit der Zahl 5 kürzen. Das ergibt dann 24\gdef\cloze#1{\colorbox{none}{\color{transparent}{\large{$\displaystyle #1$}}}} \dfrac{2}{4}. Diesen Bruch kann man aber noch weiter kürzen und zwar mit der Zahl 2! Die größtmögliche Zahl, mit der man 1020\gdef\cloze#1{\colorbox{none}{\color{transparent}{\large{$\displaystyle #1$}}}} \dfrac{10}{20} kürzen kann, ist somit 5∙2 = 10.

10

3

3

5

5

2

2

3
Kürze mit der angegebenen Zahl.

  • \gdef\cloze#1{\colorbox{none}{\color{transparent}{\large{$\displaystyle #1$}}}} \hspace*{0.2cm} 10:220:2\gdef\cloze#1{\colorbox{none}{\color{transparent}{\large{$\displaystyle #1$}}}} \dfrac{10 :2}{20 : 2} \gdef\cloze#1{\colorbox{none}{\color{transparent}{\large{$\displaystyle #1$}}}} \hspace*{0.3cm} \gdef\cloze#1{\colorbox{none}{\color{transparent}{\large{$\displaystyle #1$}}}} \hspace*{0.3cm} =\gdef\cloze#1{\colorbox{none}{\color{transparent}{\large{$\displaystyle #1$}}}} \hspace*{0.3cm}510\gdef\cloze#1{\colorbox{none}{\color{transparent}{\large{$\displaystyle #1$}}}} \dfrac{5}{10}



  • \gdef\cloze#1{\colorbox{none}{\color{transparent}{\large{$\displaystyle #1$}}}} \hspace*{0.2cm} 18:220:2\gdef\cloze#1{\colorbox{none}{\color{transparent}{\large{$\displaystyle #1$}}}} \dfrac{18 :2}{20 : 2} \gdef\cloze#1{\colorbox{none}{\color{transparent}{\large{$\displaystyle #1$}}}} \hspace*{0.3cm} \gdef\cloze#1{\colorbox{none}{\color{transparent}{\large{$\displaystyle #1$}}}} \hspace*{0.3cm} =\gdef\cloze#1{\colorbox{none}{\color{transparent}{\large{$\displaystyle #1$}}}} \hspace*{0.3cm}910\gdef\cloze#1{\colorbox{none}{\color{transparent}{\large{$\displaystyle #1$}}}} \dfrac{9}{10}



  • \gdef\cloze#1{\colorbox{none}{\color{transparent}{\large{$\displaystyle #1$}}}} \hspace*{0.2cm} 10:530:5\gdef\cloze#1{\colorbox{none}{\color{transparent}{\large{$\displaystyle #1$}}}} \dfrac{10 :5}{30 : 5} \gdef\cloze#1{\colorbox{none}{\color{transparent}{\large{$\displaystyle #1$}}}} \hspace*{0.3cm} \gdef\cloze#1{\colorbox{none}{\color{transparent}{\large{$\displaystyle #1$}}}} \hspace*{0.3cm} =\gdef\cloze#1{\colorbox{none}{\color{transparent}{\large{$\displaystyle #1$}}}} \hspace*{0.3cm}26\gdef\cloze#1{\colorbox{none}{\color{transparent}{\large{$\displaystyle #1$}}}} \dfrac{2}{6}



  • \gdef\cloze#1{\colorbox{none}{\color{transparent}{\large{$\displaystyle #1$}}}} \hspace*{0.2cm} 2:28:2\gdef\cloze#1{\colorbox{none}{\color{transparent}{\large{$\displaystyle #1$}}}} \dfrac{2 :2}{8: 2} \gdef\cloze#1{\colorbox{none}{\color{transparent}{\large{$\displaystyle #1$}}}} \hspace*{0.4cm} \gdef\cloze#1{\colorbox{none}{\color{transparent}{\large{$\displaystyle #1$}}}} \hspace*{0.4cm} =\gdef\cloze#1{\colorbox{none}{\color{transparent}{\large{$\displaystyle #1$}}}} \hspace*{0.3cm}14\gdef\cloze#1{\colorbox{none}{\color{transparent}{\large{$\displaystyle #1$}}}} \dfrac{1}{4}



  • \gdef\cloze#1{\colorbox{none}{\color{transparent}{\large{$\displaystyle #1$}}}} \hspace*{0.1cm} 300:100400:100\gdef\cloze#1{\colorbox{none}{\color{transparent}{\large{$\displaystyle #1$}}}} \dfrac{300 :100}{400: 100} \gdef\cloze#1{\colorbox{none}{\color{transparent}{\large{$\displaystyle #1$}}}} \hspace*{0.1cm} \gdef\cloze#1{\colorbox{none}{\color{transparent}{\large{$\displaystyle #1$}}}} \hspace*{0.1cm} =\gdef\cloze#1{\colorbox{none}{\color{transparent}{\large{$\displaystyle #1$}}}} \hspace*{0.3cm}34\gdef\cloze#1{\colorbox{none}{\color{transparent}{\large{$\displaystyle #1$}}}} \dfrac{3}{4}