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Number Bonds Worksheet (to 10 and 100)

Mental maths lesson 1: Number bonds to 10 and 100 · Set 961 · 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. 1.77 + ? = 100
  2. 2.2 + ? = 10
  3. 3.9 + ? = 10
  4. 4.7 + ? = 10
  5. 5.1 + ? = 10
  6. 6.22 + ? = 100
  7. 7.42 + ? = 100
  8. 8.20 + ? = 100
  9. 9.37 + ? = 100
  10. 10.3 + ? = 10
  11. 11.51 + ? = 100
  12. 12.6 + ? = 10
  13. 13.38 + ? = 100
  14. 14.4 + ? = 10
  15. 15.15 + ? = 100
  16. 16.17 + ? = 100
  17. 17.11 + ? = 100
  18. 18.5 + ? = 10
  19. 19.57 + ? = 100
  20. 20.35 + ? = 100
  21. 21.88 + ? = 100
  22. 22.8 + ? = 10
  23. 23.27 + ? = 100
  24. 24.23 + ? = 100
  25. 25.67 + ? = 100
  26. 26.21 + ? = 100
  27. 27.48 + ? = 100
  28. 28.55 + ? = 100
  29. 29.78 + ? = 100
  30. 30.32 + ? = 100
  31. 31.71 + ? = 100
  32. 32.24 + ? = 100
  33. 33.18 + ? = 100
  34. 34.13 + ? = 100
  35. 35.85 + ? = 100
  36. 36.73 + ? = 100
  37. 37.54 + ? = 100
  38. 38.58 + ? = 100
  39. 39.80 + ? = 100
  40. 40.39 + ? = 100

Answer key

  1. 23
  2. 8
  3. 1
  4. 3
  5. 9
  6. 78
  7. 58
  8. 80
  9. 63
  10. 7
  11. 49
  12. 4
  13. 62
  14. 6
  15. 85
  16. 83
  17. 89
  18. 5
  19. 43
  20. 65
  21. 12
  22. 2
  23. 73
  24. 77
  25. 33
  26. 79
  27. 52
  28. 45
  29. 22
  30. 68
  31. 29
  32. 76
  33. 82
  34. 87
  35. 15
  36. 27
  37. 46
  38. 42
  39. 20
  40. 61

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