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Number Bonds Worksheet (to 10 and 100)

Mental maths lesson 1: Number bonds to 10 and 100 · Set 277 · 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. 1.2 + ? = 10
  2. 2.56 + ? = 100
  3. 3.83 + ? = 100
  4. 4.8 + ? = 10
  5. 5.5 + ? = 10
  6. 6.20 + ? = 100
  7. 7.3 + ? = 10
  8. 8.22 + ? = 100
  9. 9.23 + ? = 100
  10. 10.40 + ? = 100
  11. 11.41 + ? = 100
  12. 12.6 + ? = 10
  13. 13.4 + ? = 10
  14. 14.44 + ? = 100
  15. 15.57 + ? = 100
  16. 16.30 + ? = 100
  17. 17.7 + ? = 10
  18. 18.49 + ? = 100
  19. 19.48 + ? = 100
  20. 20.25 + ? = 100
  21. 21.9 + ? = 10
  22. 22.74 + ? = 100
  23. 23.13 + ? = 100
  24. 24.61 + ? = 100
  25. 25.47 + ? = 100
  26. 26.43 + ? = 100
  27. 27.51 + ? = 100
  28. 28.69 + ? = 100
  29. 29.18 + ? = 100
  30. 30.15 + ? = 100
  31. 31.80 + ? = 100
  32. 32.12 + ? = 100
  33. 33.58 + ? = 100
  34. 34.72 + ? = 100
  35. 35.55 + ? = 100
  36. 36.36 + ? = 100
  37. 37.60 + ? = 100
  38. 38.27 + ? = 100
  39. 39.64 + ? = 100
  40. 40.28 + ? = 100

Answer key

  1. 8
  2. 44
  3. 17
  4. 2
  5. 5
  6. 80
  7. 7
  8. 78
  9. 77
  10. 60
  11. 59
  12. 4
  13. 6
  14. 56
  15. 43
  16. 70
  17. 3
  18. 51
  19. 52
  20. 75
  21. 1
  22. 26
  23. 87
  24. 39
  25. 53
  26. 57
  27. 49
  28. 31
  29. 82
  30. 85
  31. 20
  32. 88
  33. 42
  34. 28
  35. 45
  36. 64
  37. 40
  38. 73
  39. 36
  40. 72

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