Grade 2 math · C.1 · Facts to 20
Add within 20
Add. Use doubles, make ten or count on.
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Omar wonders: 11 + 0 =
Answer: 11
Nia thinks: 11 + 1 =
Answer: 12
Nia says: 1 + 9 =
Answer: 10
Tip: Add. Use doubles, make ten or count on.
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