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Number Bonds Worksheet (to 10 and 100)

Mental maths lesson 1: Number bonds to 10 and 100 · Set 519 · 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. 1.81 + ? = 100
  2. 2.3 + ? = 10
  3. 3.73 + ? = 100
  4. 4.5 + ? = 10
  5. 5.64 + ? = 100
  6. 6.14 + ? = 100
  7. 7.48 + ? = 100
  8. 8.8 + ? = 10
  9. 9.78 + ? = 100
  10. 10.55 + ? = 100
  11. 11.24 + ? = 100
  12. 12.15 + ? = 100
  13. 13.4 + ? = 10
  14. 14.30 + ? = 100
  15. 15.19 + ? = 100
  16. 16.21 + ? = 100
  17. 17.47 + ? = 100
  18. 18.84 + ? = 100
  19. 19.9 + ? = 10
  20. 20.7 + ? = 10
  21. 21.25 + ? = 100
  22. 22.1 + ? = 10
  23. 23.13 + ? = 100
  24. 24.32 + ? = 100
  25. 25.2 + ? = 10
  26. 26.53 + ? = 100
  27. 27.6 + ? = 10
  28. 28.17 + ? = 100
  29. 29.62 + ? = 100
  30. 30.35 + ? = 100
  31. 31.29 + ? = 100
  32. 32.86 + ? = 100
  33. 33.23 + ? = 100
  34. 34.52 + ? = 100
  35. 35.69 + ? = 100
  36. 36.71 + ? = 100
  37. 37.51 + ? = 100
  38. 38.27 + ? = 100
  39. 39.63 + ? = 100
  40. 40.67 + ? = 100

Answer key

  1. 19
  2. 7
  3. 27
  4. 5
  5. 36
  6. 86
  7. 52
  8. 2
  9. 22
  10. 45
  11. 76
  12. 85
  13. 6
  14. 70
  15. 81
  16. 79
  17. 53
  18. 16
  19. 1
  20. 3
  21. 75
  22. 9
  23. 87
  24. 68
  25. 8
  26. 47
  27. 4
  28. 83
  29. 38
  30. 65
  31. 71
  32. 14
  33. 77
  34. 48
  35. 31
  36. 29
  37. 49
  38. 73
  39. 37
  40. 33

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