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Fact Families 1st Grade

Fact Families 1st Grade. Wednesday, March 12, 2014 Ms. Butler. Definition. Four math problems -Two addition sentences -Two subtraction sentences Use the same three numbers. Addition Sentences. 2, 3, 5 2+3=5 What number is first? 3+2=5 What number is first? Are the same numbers used?.

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Fact Families 1st Grade

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  1. Fact Families1st Grade Wednesday, March 12, 2014 Ms. Butler

  2. Definition • Four math problems -Two addition sentences -Two subtraction sentences • Use the same three numbers

  3. Addition Sentences 2, 3, 5 2+3=5 What number is first? 3+2=5 What number is first? Are the same numbers used?

  4. Subtraction Sentences 2, 3, 5 5-2=3 5-3=2 What number is first in both sentences? How are the sentences different? Are the same numbers used?

  5. Now You Try! What two addition sentences can you write for these three numbers? • 8 5

  6. If you said……….. 3 + 5 = 8 or 5 + 3 = 8 Then you were correct! Give yourself a round of applause!!!!!!

  7. Now You Try! What two subtraction sentences can you write for these three numbers? • 8 5

  8. If you said……….. 8 – 5 = 3 or 8 – 3 = 5 Then you were correct! Give yourself a round of applause!!!!!!

  9. Let’s Review A fact family: • uses the same three numbers • has two addition sentences • has two subtraction sentences

  10. Great Websites: • Kaboose • Fact Families • Skill Builders • More Games

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