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Number Bonds Worksheet (to 10 and 100)

Mental maths lesson 1: Number bonds to 10 and 100 · Set 712 · 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. 1.6 + ? = 10
  2. 2.26 + ? = 100
  3. 3.43 + ? = 100
  4. 4.8 + ? = 10
  5. 5.48 + ? = 100
  6. 6.75 + ? = 100
  7. 7.61 + ? = 100
  8. 8.55 + ? = 100
  9. 9.13 + ? = 100
  10. 10.23 + ? = 100
  11. 11.24 + ? = 100
  12. 12.60 + ? = 100
  13. 13.3 + ? = 10
  14. 14.41 + ? = 100
  15. 15.5 + ? = 10
  16. 16.1 + ? = 10
  17. 17.7 + ? = 10
  18. 18.89 + ? = 100
  19. 19.4 + ? = 10
  20. 20.68 + ? = 100
  21. 21.54 + ? = 100
  22. 22.19 + ? = 100
  23. 23.47 + ? = 100
  24. 24.66 + ? = 100
  25. 25.25 + ? = 100
  26. 26.74 + ? = 100
  27. 27.57 + ? = 100
  28. 28.76 + ? = 100
  29. 29.79 + ? = 100
  30. 30.2 + ? = 10
  31. 31.32 + ? = 100
  32. 32.52 + ? = 100
  33. 33.58 + ? = 100
  34. 34.9 + ? = 10
  35. 35.85 + ? = 100
  36. 36.33 + ? = 100
  37. 37.59 + ? = 100
  38. 38.50 + ? = 100
  39. 39.62 + ? = 100
  40. 40.14 + ? = 100

Answer key

  1. 4
  2. 74
  3. 57
  4. 2
  5. 52
  6. 25
  7. 39
  8. 45
  9. 87
  10. 77
  11. 76
  12. 40
  13. 7
  14. 59
  15. 5
  16. 9
  17. 3
  18. 11
  19. 6
  20. 32
  21. 46
  22. 81
  23. 53
  24. 34
  25. 75
  26. 26
  27. 43
  28. 24
  29. 21
  30. 8
  31. 68
  32. 48
  33. 42
  34. 1
  35. 15
  36. 67
  37. 41
  38. 50
  39. 38
  40. 86

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