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Number Bonds Worksheet (to 10 and 100)

Mental maths lesson 1: Number bonds to 10 and 100 · Set 451 · 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. 1.1 + ? = 10
  2. 2.9 + ? = 10
  3. 3.61 + ? = 100
  4. 4.3 + ? = 10
  5. 5.2 + ? = 10
  6. 6.72 + ? = 100
  7. 7.38 + ? = 100
  8. 8.85 + ? = 100
  9. 9.17 + ? = 100
  10. 10.32 + ? = 100
  11. 11.53 + ? = 100
  12. 12.6 + ? = 10
  13. 13.15 + ? = 100
  14. 14.60 + ? = 100
  15. 15.71 + ? = 100
  16. 16.4 + ? = 10
  17. 17.33 + ? = 100
  18. 18.23 + ? = 100
  19. 19.56 + ? = 100
  20. 20.42 + ? = 100
  21. 21.14 + ? = 100
  22. 22.7 + ? = 10
  23. 23.8 + ? = 10
  24. 24.88 + ? = 100
  25. 25.45 + ? = 100
  26. 26.30 + ? = 100
  27. 27.11 + ? = 100
  28. 28.70 + ? = 100
  29. 29.46 + ? = 100
  30. 30.19 + ? = 100
  31. 31.24 + ? = 100
  32. 32.18 + ? = 100
  33. 33.87 + ? = 100
  34. 34.77 + ? = 100
  35. 35.62 + ? = 100
  36. 36.27 + ? = 100
  37. 37.86 + ? = 100
  38. 38.47 + ? = 100
  39. 39.55 + ? = 100
  40. 40.54 + ? = 100

Answer key

  1. 9
  2. 1
  3. 39
  4. 7
  5. 8
  6. 28
  7. 62
  8. 15
  9. 83
  10. 68
  11. 47
  12. 4
  13. 85
  14. 40
  15. 29
  16. 6
  17. 67
  18. 77
  19. 44
  20. 58
  21. 86
  22. 3
  23. 2
  24. 12
  25. 55
  26. 70
  27. 89
  28. 30
  29. 54
  30. 81
  31. 76
  32. 82
  33. 13
  34. 23
  35. 38
  36. 73
  37. 14
  38. 53
  39. 45
  40. 46

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