Grade 2 math · C.3 · Facts to 20
Doubles to 20
Add the same number twice.
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See worked examples
Chen wonders: 3 + 3 =
Answer: 6
Pia says: 1 + 1 =
Answer: 2
Gus asks: 3 + 3 =
Answer: 6
Tip: Add the same number twice.
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