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Number Bonds Worksheet (to 10 and 100)

Mental maths lesson 1: Number bonds to 10 and 100 · Set 554 · 40 questions
TalentJR

How to do it in your head (Make 10): Bonds to 10: 1 + 9, 2 + 8, 3 + 7, 4 + 6, 5 + 5. Bonds to 100: the ones make 10, and the tens make 9 (because the ones already gave one ten). If the number ends in 0, the tens make 10: 40 + 60 = 100.

NameDateTime takenScore ___ / 40
  1. 1.2 + ? = 10
  2. 2.3 + ? = 10
  3. 3.14 + ? = 100
  4. 4.59 + ? = 100
  5. 5.37 + ? = 100
  6. 6.8 + ? = 10
  7. 7.29 + ? = 100
  8. 8.63 + ? = 100
  9. 9.5 + ? = 10
  10. 10.36 + ? = 100
  11. 11.75 + ? = 100
  12. 12.43 + ? = 100
  13. 13.6 + ? = 10
  14. 14.11 + ? = 100
  15. 15.88 + ? = 100
  16. 16.70 + ? = 100
  17. 17.4 + ? = 10
  18. 18.9 + ? = 10
  19. 19.24 + ? = 100
  20. 20.1 + ? = 10
  21. 21.7 + ? = 10
  22. 22.52 + ? = 100
  23. 23.44 + ? = 100
  24. 24.83 + ? = 100
  25. 25.32 + ? = 100
  26. 26.25 + ? = 100
  27. 27.68 + ? = 100
  28. 28.50 + ? = 100
  29. 29.84 + ? = 100
  30. 30.62 + ? = 100
  31. 31.23 + ? = 100
  32. 32.17 + ? = 100
  33. 33.16 + ? = 100
  34. 34.82 + ? = 100
  35. 35.80 + ? = 100
  36. 36.22 + ? = 100
  37. 37.89 + ? = 100
  38. 38.40 + ? = 100
  39. 39.26 + ? = 100
  40. 40.87 + ? = 100

Answer key

  1. 8
  2. 7
  3. 86
  4. 41
  5. 63
  6. 2
  7. 71
  8. 37
  9. 5
  10. 64
  11. 25
  12. 57
  13. 4
  14. 89
  15. 12
  16. 30
  17. 6
  18. 1
  19. 76
  20. 9
  21. 3
  22. 48
  23. 56
  24. 17
  25. 68
  26. 75
  27. 32
  28. 50
  29. 16
  30. 38
  31. 77
  32. 83
  33. 84
  34. 18
  35. 20
  36. 78
  37. 11
  38. 60
  39. 74
  40. 13

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