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Number Bonds Worksheet (to 10 and 100)

Mental maths lesson 1: Number bonds to 10 and 100 · Set 276 · 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. 1.24 + ? = 100
  2. 2.58 + ? = 100
  3. 3.68 + ? = 100
  4. 4.73 + ? = 100
  5. 5.5 + ? = 10
  6. 6.2 + ? = 10
  7. 7.11 + ? = 100
  8. 8.4 + ? = 10
  9. 9.78 + ? = 100
  10. 10.88 + ? = 100
  11. 11.1 + ? = 10
  12. 12.7 + ? = 10
  13. 13.74 + ? = 100
  14. 14.9 + ? = 10
  15. 15.60 + ? = 100
  16. 16.50 + ? = 100
  17. 17.33 + ? = 100
  18. 18.6 + ? = 10
  19. 19.72 + ? = 100
  20. 20.13 + ? = 100
  21. 21.69 + ? = 100
  22. 22.28 + ? = 100
  23. 23.56 + ? = 100
  24. 24.17 + ? = 100
  25. 25.8 + ? = 10
  26. 26.37 + ? = 100
  27. 27.84 + ? = 100
  28. 28.3 + ? = 10
  29. 29.48 + ? = 100
  30. 30.80 + ? = 100
  31. 31.25 + ? = 100
  32. 32.63 + ? = 100
  33. 33.86 + ? = 100
  34. 34.67 + ? = 100
  35. 35.36 + ? = 100
  36. 36.14 + ? = 100
  37. 37.77 + ? = 100
  38. 38.39 + ? = 100
  39. 39.83 + ? = 100
  40. 40.30 + ? = 100

Answer key

  1. 76
  2. 42
  3. 32
  4. 27
  5. 5
  6. 8
  7. 89
  8. 6
  9. 22
  10. 12
  11. 9
  12. 3
  13. 26
  14. 1
  15. 40
  16. 50
  17. 67
  18. 4
  19. 28
  20. 87
  21. 31
  22. 72
  23. 44
  24. 83
  25. 2
  26. 63
  27. 16
  28. 7
  29. 52
  30. 20
  31. 75
  32. 37
  33. 14
  34. 33
  35. 64
  36. 86
  37. 23
  38. 61
  39. 17
  40. 70

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