L'opération Manquante (Addition & Soustraction) - One atta Time

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Determine which letter best represents the missing fact from the fact family.

99 + 1 = 100

1 + 99 = 100

100 - 99 = 1

100 - 1 = 99 100 + 1 = 101 1 - 100 = 99 100 - 99 = 99

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