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Adding 9 within 20 worksheets Grade 1

Add 9 by making 10 first: 9 + 6 is 10 + 5.

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How to do it

Make 10: 9 + 6 is 9 + 1 + 5, which is 10 + 5.

9+2=9+1+1=10+1=119 + 2 = 9 + 1 + 1 = 10 + 1 = 11make 10: split 2 into 1 and 1

Example problems

  1. 7+9=7 + 9 =
  2. 2+9=2 + 9 =
  3. 10+9=10 + 9 =
  4. 9+6=9 + 6 =

Addition facts within 20

  1. Adding 4 within 20
  2. Adding 5 within 20
  3. Adding 6 within 20
  4. Adding 7 within 20
  5. Adding 8 within 20
  6. Adding 9 within 20
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  8. Teen numbers plus ones
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