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Number Bonds Worksheet (to 10 and 100)

Mental maths lesson 1: Number bonds to 10 and 100 · Set 182 · 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. 1.33 + ? = 100
  2. 2.5 + ? = 10
  3. 3.27 + ? = 100
  4. 4.63 + ? = 100
  5. 5.3 + ? = 10
  6. 6.8 + ? = 10
  7. 7.6 + ? = 10
  8. 8.7 + ? = 10
  9. 9.60 + ? = 100
  10. 10.23 + ? = 100
  11. 11.1 + ? = 10
  12. 12.4 + ? = 10
  13. 13.44 + ? = 100
  14. 14.89 + ? = 100
  15. 15.35 + ? = 100
  16. 16.67 + ? = 100
  17. 17.65 + ? = 100
  18. 18.41 + ? = 100
  19. 19.42 + ? = 100
  20. 20.36 + ? = 100
  21. 21.9 + ? = 10
  22. 22.85 + ? = 100
  23. 23.48 + ? = 100
  24. 24.59 + ? = 100
  25. 25.15 + ? = 100
  26. 26.14 + ? = 100
  27. 27.40 + ? = 100
  28. 28.21 + ? = 100
  29. 29.2 + ? = 10
  30. 30.73 + ? = 100
  31. 31.76 + ? = 100
  32. 32.52 + ? = 100
  33. 33.72 + ? = 100
  34. 34.11 + ? = 100
  35. 35.17 + ? = 100
  36. 36.78 + ? = 100
  37. 37.86 + ? = 100
  38. 38.75 + ? = 100
  39. 39.87 + ? = 100
  40. 40.46 + ? = 100

Answer key

  1. 67
  2. 5
  3. 73
  4. 37
  5. 7
  6. 2
  7. 4
  8. 3
  9. 40
  10. 77
  11. 9
  12. 6
  13. 56
  14. 11
  15. 65
  16. 33
  17. 35
  18. 59
  19. 58
  20. 64
  21. 1
  22. 15
  23. 52
  24. 41
  25. 85
  26. 86
  27. 60
  28. 79
  29. 8
  30. 27
  31. 24
  32. 48
  33. 28
  34. 89
  35. 83
  36. 22
  37. 14
  38. 25
  39. 13
  40. 54

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