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Number Bonds Worksheet (to 10 and 100)

Mental maths lesson 1: Number bonds to 10 and 100 · Set 623 · 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. 1.17 + ? = 100
  2. 2.7 + ? = 10
  3. 3.1 + ? = 10
  4. 4.35 + ? = 100
  5. 5.74 + ? = 100
  6. 6.75 + ? = 100
  7. 7.9 + ? = 10
  8. 8.24 + ? = 100
  9. 9.88 + ? = 100
  10. 10.3 + ? = 10
  11. 11.5 + ? = 10
  12. 12.16 + ? = 100
  13. 13.45 + ? = 100
  14. 14.6 + ? = 10
  15. 15.73 + ? = 100
  16. 16.8 + ? = 10
  17. 17.4 + ? = 10
  18. 18.14 + ? = 100
  19. 19.38 + ? = 100
  20. 20.33 + ? = 100
  21. 21.18 + ? = 100
  22. 22.55 + ? = 100
  23. 23.79 + ? = 100
  24. 24.51 + ? = 100
  25. 25.26 + ? = 100
  26. 26.42 + ? = 100
  27. 27.23 + ? = 100
  28. 28.86 + ? = 100
  29. 29.12 + ? = 100
  30. 30.84 + ? = 100
  31. 31.68 + ? = 100
  32. 32.70 + ? = 100
  33. 33.83 + ? = 100
  34. 34.36 + ? = 100
  35. 35.21 + ? = 100
  36. 36.27 + ? = 100
  37. 37.62 + ? = 100
  38. 38.65 + ? = 100
  39. 39.40 + ? = 100
  40. 40.25 + ? = 100

Answer key

  1. 83
  2. 3
  3. 9
  4. 65
  5. 26
  6. 25
  7. 1
  8. 76
  9. 12
  10. 7
  11. 5
  12. 84
  13. 55
  14. 4
  15. 27
  16. 2
  17. 6
  18. 86
  19. 62
  20. 67
  21. 82
  22. 45
  23. 21
  24. 49
  25. 74
  26. 58
  27. 77
  28. 14
  29. 88
  30. 16
  31. 32
  32. 30
  33. 17
  34. 64
  35. 79
  36. 73
  37. 38
  38. 35
  39. 60
  40. 75

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