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Number Bonds Worksheet (to 10 and 100)

Mental maths lesson 1: Number bonds to 10 and 100 · Set 614 · 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. 1.13 + ? = 100
  2. 2.2 + ? = 10
  3. 3.26 + ? = 100
  4. 4.43 + ? = 100
  5. 5.6 + ? = 10
  6. 6.40 + ? = 100
  7. 7.5 + ? = 10
  8. 8.58 + ? = 100
  9. 9.8 + ? = 10
  10. 10.53 + ? = 100
  11. 11.1 + ? = 10
  12. 12.9 + ? = 10
  13. 13.72 + ? = 100
  14. 14.22 + ? = 100
  15. 15.71 + ? = 100
  16. 16.7 + ? = 10
  17. 17.45 + ? = 100
  18. 18.79 + ? = 100
  19. 19.29 + ? = 100
  20. 20.52 + ? = 100
  21. 21.3 + ? = 10
  22. 22.80 + ? = 100
  23. 23.65 + ? = 100
  24. 24.4 + ? = 10
  25. 25.88 + ? = 100
  26. 26.27 + ? = 100
  27. 27.73 + ? = 100
  28. 28.55 + ? = 100
  29. 29.47 + ? = 100
  30. 30.85 + ? = 100
  31. 31.16 + ? = 100
  32. 32.30 + ? = 100
  33. 33.12 + ? = 100
  34. 34.18 + ? = 100
  35. 35.44 + ? = 100
  36. 36.17 + ? = 100
  37. 37.66 + ? = 100
  38. 38.24 + ? = 100
  39. 39.15 + ? = 100
  40. 40.38 + ? = 100

Answer key

  1. 87
  2. 8
  3. 74
  4. 57
  5. 4
  6. 60
  7. 5
  8. 42
  9. 2
  10. 47
  11. 9
  12. 1
  13. 28
  14. 78
  15. 29
  16. 3
  17. 55
  18. 21
  19. 71
  20. 48
  21. 7
  22. 20
  23. 35
  24. 6
  25. 12
  26. 73
  27. 27
  28. 45
  29. 53
  30. 15
  31. 84
  32. 70
  33. 88
  34. 82
  35. 56
  36. 83
  37. 34
  38. 76
  39. 85
  40. 62

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