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Sharing Marbles: A Fair Division
Grade · Subject
Grade 4 · Maths
Topic
Division as fair sharing
Estimated time
8 min
Cards · ArcaGuide
6 cards · Enabled
Scene
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Ravi's marbles
Ravi has 12 shiny marbles. His three best friends — Sara, Jay and Mei — come over to play.
Goal: share the marbles so everyone has the same number.
Your choice
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How should Ravi share?
Pick the strategy you think Ravi should try.
What happened
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What happened?
See how your choice played out.
A.Sara got 5, Jay got 3, Mei got 2. Nobody is happy — it's not fair.
B.Everyone ends up with 4 marbles and none are left. It worked — but did you know it would?
C.12 ÷ 3 = 4. Each friend gets exactly 4 marbles. Fair and fast.
Twist
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A twist!
Just as they finish sharing, Ravi's cousin Aman knocks on the door and wants to play too.
Now there are 4 friends. Can Ravi still share 12 marbles equally?
Your choice
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Re-think the share
Pick the move that works for 4 friends.
Debrief
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What did you learn?
Division is just fair sharing. The number of friends changes the answer.
Concept: division = total ÷ number of groups.
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