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Number Bonds Worksheet (to 10 and 100)

Mental maths lesson 1: Number bonds to 10 and 100 · Set 602 · 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. 1.2 + ? = 10
  2. 2.8 + ? = 10
  3. 3.70 + ? = 100
  4. 4.6 + ? = 10
  5. 5.7 + ? = 10
  6. 6.83 + ? = 100
  7. 7.82 + ? = 100
  8. 8.27 + ? = 100
  9. 9.23 + ? = 100
  10. 10.37 + ? = 100
  11. 11.29 + ? = 100
  12. 12.67 + ? = 100
  13. 13.38 + ? = 100
  14. 14.74 + ? = 100
  15. 15.33 + ? = 100
  16. 16.12 + ? = 100
  17. 17.9 + ? = 10
  18. 18.14 + ? = 100
  19. 19.1 + ? = 10
  20. 20.4 + ? = 10
  21. 21.43 + ? = 100
  22. 22.71 + ? = 100
  23. 23.3 + ? = 10
  24. 24.44 + ? = 100
  25. 25.19 + ? = 100
  26. 26.11 + ? = 100
  27. 27.72 + ? = 100
  28. 28.15 + ? = 100
  29. 29.76 + ? = 100
  30. 30.68 + ? = 100
  31. 31.17 + ? = 100
  32. 32.24 + ? = 100
  33. 33.34 + ? = 100
  34. 34.5 + ? = 10
  35. 35.32 + ? = 100
  36. 36.89 + ? = 100
  37. 37.56 + ? = 100
  38. 38.65 + ? = 100
  39. 39.21 + ? = 100
  40. 40.20 + ? = 100

Answer key

  1. 8
  2. 2
  3. 30
  4. 4
  5. 3
  6. 17
  7. 18
  8. 73
  9. 77
  10. 63
  11. 71
  12. 33
  13. 62
  14. 26
  15. 67
  16. 88
  17. 1
  18. 86
  19. 9
  20. 6
  21. 57
  22. 29
  23. 7
  24. 56
  25. 81
  26. 89
  27. 28
  28. 85
  29. 24
  30. 32
  31. 83
  32. 76
  33. 66
  34. 5
  35. 68
  36. 11
  37. 44
  38. 35
  39. 79
  40. 80

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