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Number Bonds Worksheet (to 10 and 100)

Mental maths lesson 1: Number bonds to 10 and 100 · Set 430 · 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. 1.4 + ? = 10
  2. 2.74 + ? = 100
  3. 3.36 + ? = 100
  4. 4.76 + ? = 100
  5. 5.3 + ? = 10
  6. 6.26 + ? = 100
  7. 7.88 + ? = 100
  8. 8.52 + ? = 100
  9. 9.5 + ? = 10
  10. 10.15 + ? = 100
  11. 11.27 + ? = 100
  12. 12.23 + ? = 100
  13. 13.21 + ? = 100
  14. 14.9 + ? = 10
  15. 15.28 + ? = 100
  16. 16.84 + ? = 100
  17. 17.34 + ? = 100
  18. 18.19 + ? = 100
  19. 19.66 + ? = 100
  20. 20.16 + ? = 100
  21. 21.22 + ? = 100
  22. 22.12 + ? = 100
  23. 23.7 + ? = 10
  24. 24.2 + ? = 10
  25. 25.77 + ? = 100
  26. 26.71 + ? = 100
  27. 27.86 + ? = 100
  28. 28.6 + ? = 10
  29. 29.64 + ? = 100
  30. 30.56 + ? = 100
  31. 31.83 + ? = 100
  32. 32.85 + ? = 100
  33. 33.18 + ? = 100
  34. 34.8 + ? = 10
  35. 35.40 + ? = 100
  36. 36.59 + ? = 100
  37. 37.1 + ? = 10
  38. 38.42 + ? = 100
  39. 39.53 + ? = 100
  40. 40.38 + ? = 100

Answer key

  1. 6
  2. 26
  3. 64
  4. 24
  5. 7
  6. 74
  7. 12
  8. 48
  9. 5
  10. 85
  11. 73
  12. 77
  13. 79
  14. 1
  15. 72
  16. 16
  17. 66
  18. 81
  19. 34
  20. 84
  21. 78
  22. 88
  23. 3
  24. 8
  25. 23
  26. 29
  27. 14
  28. 4
  29. 36
  30. 44
  31. 17
  32. 15
  33. 82
  34. 2
  35. 60
  36. 41
  37. 9
  38. 58
  39. 47
  40. 62

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