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Number Bonds Worksheet (to 10 and 100)

Mental maths lesson 1: Number bonds to 10 and 100 · Set 514 · 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. 1.82 + ? = 100
  2. 2.1 + ? = 10
  3. 3.3 + ? = 10
  4. 4.40 + ? = 100
  5. 5.70 + ? = 100
  6. 6.6 + ? = 10
  7. 7.21 + ? = 100
  8. 8.43 + ? = 100
  9. 9.22 + ? = 100
  10. 10.8 + ? = 10
  11. 11.24 + ? = 100
  12. 12.74 + ? = 100
  13. 13.86 + ? = 100
  14. 14.15 + ? = 100
  15. 15.17 + ? = 100
  16. 16.7 + ? = 10
  17. 17.19 + ? = 100
  18. 18.65 + ? = 100
  19. 19.26 + ? = 100
  20. 20.41 + ? = 100
  21. 21.59 + ? = 100
  22. 22.71 + ? = 100
  23. 23.88 + ? = 100
  24. 24.56 + ? = 100
  25. 25.5 + ? = 10
  26. 26.89 + ? = 100
  27. 27.46 + ? = 100
  28. 28.52 + ? = 100
  29. 29.48 + ? = 100
  30. 30.2 + ? = 10
  31. 31.57 + ? = 100
  32. 32.63 + ? = 100
  33. 33.4 + ? = 10
  34. 34.36 + ? = 100
  35. 35.84 + ? = 100
  36. 36.27 + ? = 100
  37. 37.60 + ? = 100
  38. 38.62 + ? = 100
  39. 39.55 + ? = 100
  40. 40.9 + ? = 10

Answer key

  1. 18
  2. 9
  3. 7
  4. 60
  5. 30
  6. 4
  7. 79
  8. 57
  9. 78
  10. 2
  11. 76
  12. 26
  13. 14
  14. 85
  15. 83
  16. 3
  17. 81
  18. 35
  19. 74
  20. 59
  21. 41
  22. 29
  23. 12
  24. 44
  25. 5
  26. 11
  27. 54
  28. 48
  29. 52
  30. 8
  31. 43
  32. 37
  33. 6
  34. 64
  35. 16
  36. 73
  37. 40
  38. 38
  39. 45
  40. 1

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