FreeMath
Grade 2easy

Doubles Plus One Practice

Practice doubles plus one facts for second grade. Use the doubles-plus-one strategy: for 6+7, think double 6 (12) plus 1 = 13.

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All 20 Practice Problems

Every question in this set. Solve them on paper, or use the interactive tool above for instant feedback and hints.

  1. 1.3 + 4 = ? (Think: 3+3+1)
  2. 2.5 + 6 = ? (Think: 5+5+1)
  3. 3.7 + 8 = ? (Think: 7+7+1)
  4. 4.4 + 5 = ? (Think: 4+4+1)
  5. 5.6 + 7 = ? (Think: 6+6+1)
  6. 6.8 + 9 = ? (Think: 8+8+1)
  7. 7.2 + 3 = ? (Think: 2+2+1)
  8. 8.9 + 10 = ? (Think: 9+9+1)
  9. 9.1 + 2 = ? (Think: 1+1+1)
  10. 10.4 + 3 = ?
  11. 11.6 + 5 = ?
  12. 12.8 + 7 = ?
  13. 13.5 + 4 = ?
  14. 14.7 + 6 = ?
  15. 15.9 + 8 = ?
  16. 16.3 + 2 = ?
  17. 17.10 + 9 = ?
  18. 18.2 + 1 = ?
  19. 19.6 + 7 = ?
  20. 20.8 + 9 = ?
Show answer key
  1. 1.3 + 4 = ? (Think: 3+3+1) Answer: 7
  2. 2.5 + 6 = ? (Think: 5+5+1) Answer: 11
  3. 3.7 + 8 = ? (Think: 7+7+1) Answer: 15
  4. 4.4 + 5 = ? (Think: 4+4+1) Answer: 9
  5. 5.6 + 7 = ? (Think: 6+6+1) Answer: 13
  6. 6.8 + 9 = ? (Think: 8+8+1) Answer: 17
  7. 7.2 + 3 = ? (Think: 2+2+1) Answer: 5
  8. 8.9 + 10 = ? (Think: 9+9+1) Answer: 19
  9. 9.1 + 2 = ? (Think: 1+1+1) Answer: 3
  10. 10.4 + 3 = ? Answer: 7
  11. 11.6 + 5 = ? Answer: 11
  12. 12.8 + 7 = ? Answer: 15
  13. 13.5 + 4 = ? Answer: 9
  14. 14.7 + 6 = ? Answer: 13
  15. 15.9 + 8 = ? Answer: 17
  16. 16.3 + 2 = ? Answer: 5
  17. 17.10 + 9 = ? Answer: 19
  18. 18.2 + 1 = ? Answer: 3
  19. 19.6 + 7 = ? Answer: 13
  20. 20.8 + 9 = ? Answer: 17

About This Practice

This practice set includes 20 near-doubles problems. This strategy makes adding consecutive numbers quick and easy.

Want more practice? See all Grade 2 practice →