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Estimer La somme et la différence de grands nombres.

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Presentation on theme: "Estimer La somme et la différence de grands nombres."— Presentation transcript:

1 Estimer La somme et la différence de grands nombres

2 Estimate The sum and difference of big numbers

3 En quelques secondes, est-ce que la réponse est bonne ou non? Comment le sais-tu si rapidement???

4 Within a second, tell me if the answer is right or wrong How can you tell very quickly???

5 OUI: tu as estimé la somme Tu arrondis chaque nombre puis tu additionnes mentalement. Ex: 56… … +40 … 100

6 YES: You estimated the sum! You rounded off each number and you added them. Ex: 56… … +40 … 100

7 Méthode 347 = environs = environs 200 (570) = environs = environs = environs 200 (704)= environs 700

8 Method 347 = around = around 200 (570) = around = around = around 200 (704)= around 700

9 Avec un partenaire: estime 1) = 2) = 3) = 4) = 5) =

10 With a partner: estimate 1) = 2) = 3) = 4) = 5) =

11 Individuellement: estime a) = b) = c) = d) = a) – = b) – = c) – = d) 129 – 123 =

12 Individually: estimate a) = b) = c) = d) = a) – = b) – = c) – = d) 129 – 123 =


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