Décomposition Flashcards

(11 cards)

1
Q

20-9=

Quelle stratégie utilises-tu?

A

Décompose le chiffre 20. EX: 10 + 10
10-9=1
Ajoute la dizaine qui n’a pas été utilisée. 1+ 10 = 11

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2
Q

20-7=

A

13

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3
Q

20-1=

A

19

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4
Q

20-14=

A

6

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5
Q

20-3=

A

17

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6
Q

20-16=

A

4

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7
Q

20-4=

A

16

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8
Q

20-9=

A

11

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9
Q

20-13=

A

7

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10
Q

20-2=

A

18

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11
Q

20-19=

A

Décompose le chiffre 20. EX: 10+10
Décompose le chiffre 19. EX: 10+9
Soustraie les décompositions: EX: 10-10= 0 10-9 = 1
20-19=1

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