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Number Bonds Worksheet (to 10 and 100)

Mental maths lesson 1: Number bonds to 10 and 100 · Set 54 · 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. 1.18 + ? = 100
  2. 2.1 + ? = 10
  3. 3.68 + ? = 100
  4. 4.8 + ? = 10
  5. 5.3 + ? = 10
  6. 6.9 + ? = 10
  7. 7.6 + ? = 10
  8. 8.84 + ? = 100
  9. 9.82 + ? = 100
  10. 10.69 + ? = 100
  11. 11.19 + ? = 100
  12. 12.2 + ? = 10
  13. 13.7 + ? = 10
  14. 14.86 + ? = 100
  15. 15.80 + ? = 100
  16. 16.33 + ? = 100
  17. 17.21 + ? = 100
  18. 18.27 + ? = 100
  19. 19.5 + ? = 10
  20. 20.45 + ? = 100
  21. 21.13 + ? = 100
  22. 22.16 + ? = 100
  23. 23.81 + ? = 100
  24. 24.54 + ? = 100
  25. 25.53 + ? = 100
  26. 26.24 + ? = 100
  27. 27.64 + ? = 100
  28. 28.15 + ? = 100
  29. 29.4 + ? = 10
  30. 30.58 + ? = 100
  31. 31.44 + ? = 100
  32. 32.38 + ? = 100
  33. 33.48 + ? = 100
  34. 34.39 + ? = 100
  35. 35.30 + ? = 100
  36. 36.74 + ? = 100
  37. 37.72 + ? = 100
  38. 38.36 + ? = 100
  39. 39.56 + ? = 100
  40. 40.41 + ? = 100

Answer key

  1. 82
  2. 9
  3. 32
  4. 2
  5. 7
  6. 1
  7. 4
  8. 16
  9. 18
  10. 31
  11. 81
  12. 8
  13. 3
  14. 14
  15. 20
  16. 67
  17. 79
  18. 73
  19. 5
  20. 55
  21. 87
  22. 84
  23. 19
  24. 46
  25. 47
  26. 76
  27. 36
  28. 85
  29. 6
  30. 42
  31. 56
  32. 62
  33. 52
  34. 61
  35. 70
  36. 26
  37. 28
  38. 64
  39. 44
  40. 59

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