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Number Bonds Worksheet (to 10 and 100)

Mental maths lesson 1: Number bonds to 10 and 100 · Set 66 · 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. 1.7 + ? = 10
  2. 2.60 + ? = 100
  3. 3.63 + ? = 100
  4. 4.9 + ? = 10
  5. 5.2 + ? = 10
  6. 6.52 + ? = 100
  7. 7.81 + ? = 100
  8. 8.35 + ? = 100
  9. 9.55 + ? = 100
  10. 10.8 + ? = 10
  11. 11.31 + ? = 100
  12. 12.11 + ? = 100
  13. 13.70 + ? = 100
  14. 14.57 + ? = 100
  15. 15.28 + ? = 100
  16. 16.6 + ? = 10
  17. 17.47 + ? = 100
  18. 18.80 + ? = 100
  19. 19.77 + ? = 100
  20. 20.71 + ? = 100
  21. 21.5 + ? = 10
  22. 22.33 + ? = 100
  23. 23.68 + ? = 100
  24. 24.4 + ? = 10
  25. 25.87 + ? = 100
  26. 26.15 + ? = 100
  27. 27.76 + ? = 100
  28. 28.83 + ? = 100
  29. 29.72 + ? = 100
  30. 30.3 + ? = 10
  31. 31.79 + ? = 100
  32. 32.27 + ? = 100
  33. 33.36 + ? = 100
  34. 34.32 + ? = 100
  35. 35.19 + ? = 100
  36. 36.58 + ? = 100
  37. 37.43 + ? = 100
  38. 38.49 + ? = 100
  39. 39.64 + ? = 100
  40. 40.12 + ? = 100

Answer key

  1. 3
  2. 40
  3. 37
  4. 1
  5. 8
  6. 48
  7. 19
  8. 65
  9. 45
  10. 2
  11. 69
  12. 89
  13. 30
  14. 43
  15. 72
  16. 4
  17. 53
  18. 20
  19. 23
  20. 29
  21. 5
  22. 67
  23. 32
  24. 6
  25. 13
  26. 85
  27. 24
  28. 17
  29. 28
  30. 7
  31. 21
  32. 73
  33. 64
  34. 68
  35. 81
  36. 42
  37. 57
  38. 51
  39. 36
  40. 88

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