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Number Bonds Worksheet (to 10 and 100)

Mental maths lesson 1: Number bonds to 10 and 100 · Set 355 · 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. 1.17 + ? = 100
  2. 2.8 + ? = 10
  3. 3.28 + ? = 100
  4. 4.80 + ? = 100
  5. 5.9 + ? = 10
  6. 6.35 + ? = 100
  7. 7.70 + ? = 100
  8. 8.27 + ? = 100
  9. 9.3 + ? = 10
  10. 10.23 + ? = 100
  11. 11.47 + ? = 100
  12. 12.30 + ? = 100
  13. 13.57 + ? = 100
  14. 14.61 + ? = 100
  15. 15.62 + ? = 100
  16. 16.2 + ? = 10
  17. 17.7 + ? = 10
  18. 18.83 + ? = 100
  19. 19.36 + ? = 100
  20. 20.4 + ? = 10
  21. 21.29 + ? = 100
  22. 22.1 + ? = 10
  23. 23.6 + ? = 10
  24. 24.45 + ? = 100
  25. 25.59 + ? = 100
  26. 26.68 + ? = 100
  27. 27.71 + ? = 100
  28. 28.5 + ? = 10
  29. 29.74 + ? = 100
  30. 30.72 + ? = 100
  31. 31.77 + ? = 100
  32. 32.42 + ? = 100
  33. 33.84 + ? = 100
  34. 34.22 + ? = 100
  35. 35.87 + ? = 100
  36. 36.12 + ? = 100
  37. 37.33 + ? = 100
  38. 38.26 + ? = 100
  39. 39.73 + ? = 100
  40. 40.21 + ? = 100

Answer key

  1. 83
  2. 2
  3. 72
  4. 20
  5. 1
  6. 65
  7. 30
  8. 73
  9. 7
  10. 77
  11. 53
  12. 70
  13. 43
  14. 39
  15. 38
  16. 8
  17. 3
  18. 17
  19. 64
  20. 6
  21. 71
  22. 9
  23. 4
  24. 55
  25. 41
  26. 32
  27. 29
  28. 5
  29. 26
  30. 28
  31. 23
  32. 58
  33. 16
  34. 78
  35. 13
  36. 88
  37. 67
  38. 74
  39. 27
  40. 79

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