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Number Bonds Worksheet (to 10 and 100)

Mental maths lesson 1: Number bonds to 10 and 100 · Set 58 · 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. 1.3 + ? = 10
  2. 2.37 + ? = 100
  3. 3.2 + ? = 10
  4. 4.86 + ? = 100
  5. 5.8 + ? = 10
  6. 6.42 + ? = 100
  7. 7.4 + ? = 10
  8. 8.15 + ? = 100
  9. 9.73 + ? = 100
  10. 10.5 + ? = 10
  11. 11.77 + ? = 100
  12. 12.24 + ? = 100
  13. 13.1 + ? = 10
  14. 14.61 + ? = 100
  15. 15.72 + ? = 100
  16. 16.23 + ? = 100
  17. 17.48 + ? = 100
  18. 18.63 + ? = 100
  19. 19.55 + ? = 100
  20. 20.47 + ? = 100
  21. 21.6 + ? = 10
  22. 22.52 + ? = 100
  23. 23.62 + ? = 100
  24. 24.27 + ? = 100
  25. 25.58 + ? = 100
  26. 26.9 + ? = 10
  27. 27.7 + ? = 10
  28. 28.60 + ? = 100
  29. 29.16 + ? = 100
  30. 30.30 + ? = 100
  31. 31.78 + ? = 100
  32. 32.41 + ? = 100
  33. 33.56 + ? = 100
  34. 34.32 + ? = 100
  35. 35.70 + ? = 100
  36. 36.82 + ? = 100
  37. 37.89 + ? = 100
  38. 38.45 + ? = 100
  39. 39.84 + ? = 100
  40. 40.31 + ? = 100

Answer key

  1. 7
  2. 63
  3. 8
  4. 14
  5. 2
  6. 58
  7. 6
  8. 85
  9. 27
  10. 5
  11. 23
  12. 76
  13. 9
  14. 39
  15. 28
  16. 77
  17. 52
  18. 37
  19. 45
  20. 53
  21. 4
  22. 48
  23. 38
  24. 73
  25. 42
  26. 1
  27. 3
  28. 40
  29. 84
  30. 70
  31. 22
  32. 59
  33. 44
  34. 68
  35. 30
  36. 18
  37. 11
  38. 55
  39. 16
  40. 69

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