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Number Bonds Worksheet (to 10 and 100)

Mental maths lesson 1: Number bonds to 10 and 100 · Set 35 · 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. 1.54 + ? = 100
  2. 2.4 + ? = 10
  3. 3.9 + ? = 10
  4. 4.58 + ? = 100
  5. 5.7 + ? = 10
  6. 6.2 + ? = 10
  7. 7.1 + ? = 10
  8. 8.33 + ? = 100
  9. 9.49 + ? = 100
  10. 10.11 + ? = 100
  11. 11.55 + ? = 100
  12. 12.5 + ? = 10
  13. 13.72 + ? = 100
  14. 14.12 + ? = 100
  15. 15.60 + ? = 100
  16. 16.48 + ? = 100
  17. 17.3 + ? = 10
  18. 18.56 + ? = 100
  19. 19.17 + ? = 100
  20. 20.61 + ? = 100
  21. 21.14 + ? = 100
  22. 22.31 + ? = 100
  23. 23.80 + ? = 100
  24. 24.26 + ? = 100
  25. 25.69 + ? = 100
  26. 26.45 + ? = 100
  27. 27.51 + ? = 100
  28. 28.84 + ? = 100
  29. 29.6 + ? = 10
  30. 30.44 + ? = 100
  31. 31.41 + ? = 100
  32. 32.73 + ? = 100
  33. 33.57 + ? = 100
  34. 34.47 + ? = 100
  35. 35.32 + ? = 100
  36. 36.77 + ? = 100
  37. 37.89 + ? = 100
  38. 38.15 + ? = 100
  39. 39.86 + ? = 100
  40. 40.53 + ? = 100

Answer key

  1. 46
  2. 6
  3. 1
  4. 42
  5. 3
  6. 8
  7. 9
  8. 67
  9. 51
  10. 89
  11. 45
  12. 5
  13. 28
  14. 88
  15. 40
  16. 52
  17. 7
  18. 44
  19. 83
  20. 39
  21. 86
  22. 69
  23. 20
  24. 74
  25. 31
  26. 55
  27. 49
  28. 16
  29. 4
  30. 56
  31. 59
  32. 27
  33. 43
  34. 53
  35. 68
  36. 23
  37. 11
  38. 85
  39. 14
  40. 47

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