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Number Bonds Worksheet (to 10 and 100)

Mental maths lesson 1: Number bonds to 10 and 100 · Set 654 · 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. 1.50 + ? = 100
  2. 2.49 + ? = 100
  3. 3.34 + ? = 100
  4. 4.73 + ? = 100
  5. 5.6 + ? = 10
  6. 6.3 + ? = 10
  7. 7.48 + ? = 100
  8. 8.66 + ? = 100
  9. 9.32 + ? = 100
  10. 10.7 + ? = 10
  11. 11.23 + ? = 100
  12. 12.42 + ? = 100
  13. 13.8 + ? = 10
  14. 14.9 + ? = 10
  15. 15.69 + ? = 100
  16. 16.4 + ? = 10
  17. 17.15 + ? = 100
  18. 18.41 + ? = 100
  19. 19.57 + ? = 100
  20. 20.5 + ? = 10
  21. 21.62 + ? = 100
  22. 22.13 + ? = 100
  23. 23.61 + ? = 100
  24. 24.14 + ? = 100
  25. 25.58 + ? = 100
  26. 26.17 + ? = 100
  27. 27.25 + ? = 100
  28. 28.2 + ? = 10
  29. 29.1 + ? = 10
  30. 30.24 + ? = 100
  31. 31.65 + ? = 100
  32. 32.83 + ? = 100
  33. 33.30 + ? = 100
  34. 34.74 + ? = 100
  35. 35.64 + ? = 100
  36. 36.29 + ? = 100
  37. 37.51 + ? = 100
  38. 38.63 + ? = 100
  39. 39.40 + ? = 100
  40. 40.86 + ? = 100

Answer key

  1. 50
  2. 51
  3. 66
  4. 27
  5. 4
  6. 7
  7. 52
  8. 34
  9. 68
  10. 3
  11. 77
  12. 58
  13. 2
  14. 1
  15. 31
  16. 6
  17. 85
  18. 59
  19. 43
  20. 5
  21. 38
  22. 87
  23. 39
  24. 86
  25. 42
  26. 83
  27. 75
  28. 8
  29. 9
  30. 76
  31. 35
  32. 17
  33. 70
  34. 26
  35. 36
  36. 71
  37. 49
  38. 37
  39. 60
  40. 14

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