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Number Bonds Worksheet (to 10 and 100)

Mental maths lesson 1: Number bonds to 10 and 100 · Set 101 · 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. 1.3 + ? = 10
  2. 2.11 + ? = 100
  3. 3.9 + ? = 10
  4. 4.66 + ? = 100
  5. 5.79 + ? = 100
  6. 6.8 + ? = 10
  7. 7.15 + ? = 100
  8. 8.7 + ? = 10
  9. 9.64 + ? = 100
  10. 10.25 + ? = 100
  11. 11.1 + ? = 10
  12. 12.48 + ? = 100
  13. 13.5 + ? = 10
  14. 14.77 + ? = 100
  15. 15.49 + ? = 100
  16. 16.51 + ? = 100
  17. 17.4 + ? = 10
  18. 18.41 + ? = 100
  19. 19.68 + ? = 100
  20. 20.2 + ? = 10
  21. 21.6 + ? = 10
  22. 22.57 + ? = 100
  23. 23.86 + ? = 100
  24. 24.44 + ? = 100
  25. 25.12 + ? = 100
  26. 26.52 + ? = 100
  27. 27.58 + ? = 100
  28. 28.43 + ? = 100
  29. 29.47 + ? = 100
  30. 30.45 + ? = 100
  31. 31.24 + ? = 100
  32. 32.33 + ? = 100
  33. 33.35 + ? = 100
  34. 34.59 + ? = 100
  35. 35.21 + ? = 100
  36. 36.30 + ? = 100
  37. 37.31 + ? = 100
  38. 38.28 + ? = 100
  39. 39.26 + ? = 100
  40. 40.40 + ? = 100

Answer key

  1. 7
  2. 89
  3. 1
  4. 34
  5. 21
  6. 2
  7. 85
  8. 3
  9. 36
  10. 75
  11. 9
  12. 52
  13. 5
  14. 23
  15. 51
  16. 49
  17. 6
  18. 59
  19. 32
  20. 8
  21. 4
  22. 43
  23. 14
  24. 56
  25. 88
  26. 48
  27. 42
  28. 57
  29. 53
  30. 55
  31. 76
  32. 67
  33. 65
  34. 41
  35. 79
  36. 70
  37. 69
  38. 72
  39. 74
  40. 60

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