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Number Bonds Worksheet (to 10 and 100)

Mental maths lesson 1: Number bonds to 10 and 100 · Set 119 · 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. 1.77 + ? = 100
  2. 2.4 + ? = 10
  3. 3.38 + ? = 100
  4. 4.45 + ? = 100
  5. 5.51 + ? = 100
  6. 6.32 + ? = 100
  7. 7.1 + ? = 10
  8. 8.7 + ? = 10
  9. 9.25 + ? = 100
  10. 10.3 + ? = 10
  11. 11.63 + ? = 100
  12. 12.2 + ? = 10
  13. 13.9 + ? = 10
  14. 14.61 + ? = 100
  15. 15.26 + ? = 100
  16. 16.40 + ? = 100
  17. 17.8 + ? = 10
  18. 18.31 + ? = 100
  19. 19.35 + ? = 100
  20. 20.42 + ? = 100
  21. 21.27 + ? = 100
  22. 22.16 + ? = 100
  23. 23.29 + ? = 100
  24. 24.6 + ? = 10
  25. 25.46 + ? = 100
  26. 26.11 + ? = 100
  27. 27.82 + ? = 100
  28. 28.5 + ? = 10
  29. 29.62 + ? = 100
  30. 30.60 + ? = 100
  31. 31.23 + ? = 100
  32. 32.28 + ? = 100
  33. 33.79 + ? = 100
  34. 34.59 + ? = 100
  35. 35.87 + ? = 100
  36. 36.65 + ? = 100
  37. 37.76 + ? = 100
  38. 38.36 + ? = 100
  39. 39.14 + ? = 100
  40. 40.88 + ? = 100

Answer key

  1. 23
  2. 6
  3. 62
  4. 55
  5. 49
  6. 68
  7. 9
  8. 3
  9. 75
  10. 7
  11. 37
  12. 8
  13. 1
  14. 39
  15. 74
  16. 60
  17. 2
  18. 69
  19. 65
  20. 58
  21. 73
  22. 84
  23. 71
  24. 4
  25. 54
  26. 89
  27. 18
  28. 5
  29. 38
  30. 40
  31. 77
  32. 72
  33. 21
  34. 41
  35. 13
  36. 35
  37. 24
  38. 64
  39. 86
  40. 12

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