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Number Bonds Worksheet (to 10 and 100)

Mental maths lesson 1: Number bonds to 10 and 100 · Set 90 · 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. 1.8 + ? = 10
  2. 2.62 + ? = 100
  3. 3.7 + ? = 10
  4. 4.5 + ? = 10
  5. 5.65 + ? = 100
  6. 6.9 + ? = 10
  7. 7.73 + ? = 100
  8. 8.29 + ? = 100
  9. 9.6 + ? = 10
  10. 10.69 + ? = 100
  11. 11.1 + ? = 10
  12. 12.2 + ? = 10
  13. 13.3 + ? = 10
  14. 14.44 + ? = 100
  15. 15.4 + ? = 10
  16. 16.81 + ? = 100
  17. 17.32 + ? = 100
  18. 18.30 + ? = 100
  19. 19.75 + ? = 100
  20. 20.61 + ? = 100
  21. 21.74 + ? = 100
  22. 22.24 + ? = 100
  23. 23.59 + ? = 100
  24. 24.27 + ? = 100
  25. 25.37 + ? = 100
  26. 26.31 + ? = 100
  27. 27.60 + ? = 100
  28. 28.80 + ? = 100
  29. 29.86 + ? = 100
  30. 30.72 + ? = 100
  31. 31.88 + ? = 100
  32. 32.34 + ? = 100
  33. 33.17 + ? = 100
  34. 34.35 + ? = 100
  35. 35.70 + ? = 100
  36. 36.25 + ? = 100
  37. 37.16 + ? = 100
  38. 38.57 + ? = 100
  39. 39.41 + ? = 100
  40. 40.48 + ? = 100

Answer key

  1. 2
  2. 38
  3. 3
  4. 5
  5. 35
  6. 1
  7. 27
  8. 71
  9. 4
  10. 31
  11. 9
  12. 8
  13. 7
  14. 56
  15. 6
  16. 19
  17. 68
  18. 70
  19. 25
  20. 39
  21. 26
  22. 76
  23. 41
  24. 73
  25. 63
  26. 69
  27. 40
  28. 20
  29. 14
  30. 28
  31. 12
  32. 66
  33. 83
  34. 65
  35. 30
  36. 75
  37. 84
  38. 43
  39. 59
  40. 52

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