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Number Bonds Worksheet (to 10 and 100)

Mental maths lesson 1: Number bonds to 10 and 100 · Set 561 · 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. 1.9 + ? = 10
  2. 2.2 + ? = 10
  3. 3.1 + ? = 10
  4. 4.3 + ? = 10
  5. 5.12 + ? = 100
  6. 6.51 + ? = 100
  7. 7.4 + ? = 10
  8. 8.7 + ? = 10
  9. 9.16 + ? = 100
  10. 10.65 + ? = 100
  11. 11.71 + ? = 100
  12. 12.8 + ? = 10
  13. 13.57 + ? = 100
  14. 14.67 + ? = 100
  15. 15.27 + ? = 100
  16. 16.17 + ? = 100
  17. 17.15 + ? = 100
  18. 18.62 + ? = 100
  19. 19.87 + ? = 100
  20. 20.14 + ? = 100
  21. 21.44 + ? = 100
  22. 22.5 + ? = 10
  23. 23.81 + ? = 100
  24. 24.70 + ? = 100
  25. 25.47 + ? = 100
  26. 26.56 + ? = 100
  27. 27.35 + ? = 100
  28. 28.82 + ? = 100
  29. 29.25 + ? = 100
  30. 30.75 + ? = 100
  31. 31.74 + ? = 100
  32. 32.60 + ? = 100
  33. 33.54 + ? = 100
  34. 34.34 + ? = 100
  35. 35.21 + ? = 100
  36. 36.48 + ? = 100
  37. 37.46 + ? = 100
  38. 38.18 + ? = 100
  39. 39.52 + ? = 100
  40. 40.13 + ? = 100

Answer key

  1. 1
  2. 8
  3. 9
  4. 7
  5. 88
  6. 49
  7. 6
  8. 3
  9. 84
  10. 35
  11. 29
  12. 2
  13. 43
  14. 33
  15. 73
  16. 83
  17. 85
  18. 38
  19. 13
  20. 86
  21. 56
  22. 5
  23. 19
  24. 30
  25. 53
  26. 44
  27. 65
  28. 18
  29. 75
  30. 25
  31. 26
  32. 40
  33. 46
  34. 66
  35. 79
  36. 52
  37. 54
  38. 82
  39. 48
  40. 87

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