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Number Bonds Worksheet (to 10 and 100)

Mental maths lesson 1: Number bonds to 10 and 100 · Set 334 · 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. 1.14 + ? = 100
  2. 2.1 + ? = 10
  3. 3.7 + ? = 10
  4. 4.21 + ? = 100
  5. 5.87 + ? = 100
  6. 6.8 + ? = 10
  7. 7.6 + ? = 10
  8. 8.12 + ? = 100
  9. 9.13 + ? = 100
  10. 10.18 + ? = 100
  11. 11.34 + ? = 100
  12. 12.9 + ? = 10
  13. 13.19 + ? = 100
  14. 14.3 + ? = 10
  15. 15.23 + ? = 100
  16. 16.45 + ? = 100
  17. 17.4 + ? = 10
  18. 18.26 + ? = 100
  19. 19.68 + ? = 100
  20. 20.5 + ? = 10
  21. 21.33 + ? = 100
  22. 22.89 + ? = 100
  23. 23.27 + ? = 100
  24. 24.53 + ? = 100
  25. 25.81 + ? = 100
  26. 26.61 + ? = 100
  27. 27.48 + ? = 100
  28. 28.2 + ? = 10
  29. 29.37 + ? = 100
  30. 30.17 + ? = 100
  31. 31.66 + ? = 100
  32. 32.20 + ? = 100
  33. 33.74 + ? = 100
  34. 34.46 + ? = 100
  35. 35.22 + ? = 100
  36. 36.78 + ? = 100
  37. 37.75 + ? = 100
  38. 38.41 + ? = 100
  39. 39.82 + ? = 100
  40. 40.28 + ? = 100

Answer key

  1. 86
  2. 9
  3. 3
  4. 79
  5. 13
  6. 2
  7. 4
  8. 88
  9. 87
  10. 82
  11. 66
  12. 1
  13. 81
  14. 7
  15. 77
  16. 55
  17. 6
  18. 74
  19. 32
  20. 5
  21. 67
  22. 11
  23. 73
  24. 47
  25. 19
  26. 39
  27. 52
  28. 8
  29. 63
  30. 83
  31. 34
  32. 80
  33. 26
  34. 54
  35. 78
  36. 22
  37. 25
  38. 59
  39. 18
  40. 72

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