Arithmetic with a mirror

Schulfächer
Nutzungsrechte
Creative Commons Lizenz: CC BY-SA 4.0 INTERNATIONAL
Vervielfältigung und Verbreitung erlaubt. Unter den identischen Bedingungen. Namensnennung erforderlich.
Vervielfältigung und Verbreitung erlaubt. Unter den identischen Bedingungen. Namensnennung erforderlich.
Herkunftsnachweis
Medientyp
Text
Herausgeber/-in
Siemens Stiftung
Interactive arithmetic exercise: Five coins are arranged on a table.
How must the pocket mirror be placed to double the number of coins? (And four other exercises.
)Three possible positions for the pocket mirror are given in each case.
Click the button with a check mark to show the correct mirror position.
At the same time, a photo showing the correct answer is displayed.
How must the pocket mirror be placed to double the number of coins? (And four other exercises.
)Three possible positions for the pocket mirror are given in each case.
Click the button with a check mark to show the correct mirror position.
At the same time, a photo showing the correct answer is displayed.