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Adding 8 within 20 worksheets Grade 1

Add 8 by making 10 first: 8 + 5 is 10 + 3.

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How to do it

Make 10: 8 + 5 is 8 + 2 + 3, which is 10 + 3.

8+12=10+2+8=10+10=208 + 12 = 10 + 2 + 8 = 10 + 10 = 20add the ones; the ten stays

Example problems

  1. 8+8=8 + 8 =
  2. 2+8=2 + 8 =
  3. 5+8=5 + 8 =
  4. 6+8=6 + 8 =

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
  7. Doubles and near doubles
  8. Teen numbers plus ones
  9. All addition facts to 20
  10. Adding three numbers