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Number Bonds Worksheet (to 10 and 100)

Mental maths lesson 1: Number bonds to 10 and 100 · Set 333 · 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. 1.6 + ? = 10
  2. 2.57 + ? = 100
  3. 3.2 + ? = 10
  4. 4.74 + ? = 100
  5. 5.85 + ? = 100
  6. 6.4 + ? = 10
  7. 7.3 + ? = 10
  8. 8.33 + ? = 100
  9. 9.67 + ? = 100
  10. 10.1 + ? = 10
  11. 11.21 + ? = 100
  12. 12.54 + ? = 100
  13. 13.71 + ? = 100
  14. 14.13 + ? = 100
  15. 15.5 + ? = 10
  16. 16.19 + ? = 100
  17. 17.45 + ? = 100
  18. 18.26 + ? = 100
  19. 19.64 + ? = 100
  20. 20.8 + ? = 10
  21. 21.25 + ? = 100
  22. 22.12 + ? = 100
  23. 23.18 + ? = 100
  24. 24.7 + ? = 10
  25. 25.32 + ? = 100
  26. 26.23 + ? = 100
  27. 27.29 + ? = 100
  28. 28.14 + ? = 100
  29. 29.65 + ? = 100
  30. 30.15 + ? = 100
  31. 31.20 + ? = 100
  32. 32.22 + ? = 100
  33. 33.34 + ? = 100
  34. 34.78 + ? = 100
  35. 35.58 + ? = 100
  36. 36.47 + ? = 100
  37. 37.9 + ? = 10
  38. 38.42 + ? = 100
  39. 39.84 + ? = 100
  40. 40.89 + ? = 100

Answer key

  1. 4
  2. 43
  3. 8
  4. 26
  5. 15
  6. 6
  7. 7
  8. 67
  9. 33
  10. 9
  11. 79
  12. 46
  13. 29
  14. 87
  15. 5
  16. 81
  17. 55
  18. 74
  19. 36
  20. 2
  21. 75
  22. 88
  23. 82
  24. 3
  25. 68
  26. 77
  27. 71
  28. 86
  29. 35
  30. 85
  31. 80
  32. 78
  33. 66
  34. 22
  35. 42
  36. 53
  37. 1
  38. 58
  39. 16
  40. 11

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