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Number Bonds Worksheet (to 10 and 100)

Mental maths lesson 1: Number bonds to 10 and 100 · Set 138 · 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. 2.3 + ? = 10
  3. 3.6 + ? = 10
  4. 4.17 + ? = 100
  5. 5.2 + ? = 10
  6. 6.15 + ? = 100
  7. 7.23 + ? = 100
  8. 8.80 + ? = 100
  9. 9.9 + ? = 10
  10. 10.13 + ? = 100
  11. 11.5 + ? = 10
  12. 12.1 + ? = 10
  13. 13.47 + ? = 100
  14. 14.72 + ? = 100
  15. 15.84 + ? = 100
  16. 16.32 + ? = 100
  17. 17.58 + ? = 100
  18. 18.7 + ? = 10
  19. 19.19 + ? = 100
  20. 20.87 + ? = 100
  21. 21.11 + ? = 100
  22. 22.65 + ? = 100
  23. 23.42 + ? = 100
  24. 24.78 + ? = 100
  25. 25.34 + ? = 100
  26. 26.4 + ? = 10
  27. 27.25 + ? = 100
  28. 28.21 + ? = 100
  29. 29.67 + ? = 100
  30. 30.33 + ? = 100
  31. 31.27 + ? = 100
  32. 32.46 + ? = 100
  33. 33.31 + ? = 100
  34. 34.35 + ? = 100
  35. 35.64 + ? = 100
  36. 36.66 + ? = 100
  37. 37.68 + ? = 100
  38. 38.16 + ? = 100
  39. 39.29 + ? = 100
  40. 40.59 + ? = 100

Answer key

  1. 2
  2. 7
  3. 4
  4. 83
  5. 8
  6. 85
  7. 77
  8. 20
  9. 1
  10. 87
  11. 5
  12. 9
  13. 53
  14. 28
  15. 16
  16. 68
  17. 42
  18. 3
  19. 81
  20. 13
  21. 89
  22. 35
  23. 58
  24. 22
  25. 66
  26. 6
  27. 75
  28. 79
  29. 33
  30. 67
  31. 73
  32. 54
  33. 69
  34. 65
  35. 36
  36. 34
  37. 32
  38. 84
  39. 71
  40. 41

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