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Number Bonds Worksheet (to 10 and 100)

Mental maths lesson 1: Number bonds to 10 and 100 · Set 172 · 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. 1.16 + ? = 100
  2. 2.8 + ? = 10
  3. 3.31 + ? = 100
  4. 4.6 + ? = 10
  5. 5.7 + ? = 10
  6. 6.2 + ? = 10
  7. 7.5 + ? = 10
  8. 8.48 + ? = 100
  9. 9.23 + ? = 100
  10. 10.68 + ? = 100
  11. 11.3 + ? = 10
  12. 12.42 + ? = 100
  13. 13.29 + ? = 100
  14. 14.26 + ? = 100
  15. 15.60 + ? = 100
  16. 16.1 + ? = 10
  17. 17.80 + ? = 100
  18. 18.79 + ? = 100
  19. 19.76 + ? = 100
  20. 20.63 + ? = 100
  21. 21.61 + ? = 100
  22. 22.62 + ? = 100
  23. 23.44 + ? = 100
  24. 24.12 + ? = 100
  25. 25.43 + ? = 100
  26. 26.27 + ? = 100
  27. 27.21 + ? = 100
  28. 28.24 + ? = 100
  29. 29.4 + ? = 10
  30. 30.38 + ? = 100
  31. 31.9 + ? = 10
  32. 32.71 + ? = 100
  33. 33.15 + ? = 100
  34. 34.85 + ? = 100
  35. 35.53 + ? = 100
  36. 36.72 + ? = 100
  37. 37.59 + ? = 100
  38. 38.65 + ? = 100
  39. 39.18 + ? = 100
  40. 40.89 + ? = 100

Answer key

  1. 84
  2. 2
  3. 69
  4. 4
  5. 3
  6. 8
  7. 5
  8. 52
  9. 77
  10. 32
  11. 7
  12. 58
  13. 71
  14. 74
  15. 40
  16. 9
  17. 20
  18. 21
  19. 24
  20. 37
  21. 39
  22. 38
  23. 56
  24. 88
  25. 57
  26. 73
  27. 79
  28. 76
  29. 6
  30. 62
  31. 1
  32. 29
  33. 85
  34. 15
  35. 47
  36. 28
  37. 41
  38. 35
  39. 82
  40. 11

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