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Making the same amount with different coins

Mathématiques · Mesures · de 6 à 7 ans

Nom ______________________ Date ____________

Which coins make 20p?
- 2×10p
- 3×5p
- 1×10p+1×5p
Zoe says 20p plus 20p plus 10p equals 50p. Is Zoe right?
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You have 20p and 15p. How much altogether?
Réponse : ______________
How much money is shown below in total?
Réponse : ______________
How many 5p coins are needed to make 20p?
Réponse : ______________
Ben says one 50p coin equals five 10p coins. Is Ben right?
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Why do 2 times 20p plus 10p and 5 times 10p give the same total?
- both equal 50p
- both use p
- both are coins
- both are silver
You pay with 50p for a 30p toy. What change do you get?
Réponse : ______________
Ali says 50p can only be made one way, using one 50p coin. Is Ali right?
- No, there are other ways too, like 2×20p+10p
- Yes, that is the only way
- No, 50p can only be made with 5p coins
Zara makes 40p using 1×20p and 2×10p. She wants to use only 10p coins instead. How many 10p coins does she need?
Réponse : ______________

Corrigé

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2×10p · Two 10p coins make exactly 20p. The other choices only total 15p.
Vrai · The sum is 50.
35 · 20 plus 15 is 35p.
50 · 20p + 20p + 10p = 50p.
4 · 5p + 5p + 5p + 5p = 20p, so four 5p coins.
Vrai · Five tens equal 50.
both equal 50p · Both add to 50.
20 · 50 take away 30 is 20p.
No, there are other ways too, like 2×20p+10p · There are several ways to make 50p with different coins, not just one.
4 · Four 10p coins: 10p+10p+10p+10p = 40p, the same total as before.