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Number Bonds Worksheet (to 10 and 100)

Mental maths lesson 1: Number bonds to 10 and 100 · Set 417 · 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. 1.3 + ? = 10
  2. 2.5 + ? = 10
  3. 3.63 + ? = 100
  4. 4.9 + ? = 10
  5. 5.73 + ? = 100
  6. 6.1 + ? = 10
  7. 7.16 + ? = 100
  8. 8.2 + ? = 10
  9. 9.6 + ? = 10
  10. 10.78 + ? = 100
  11. 11.47 + ? = 100
  12. 12.84 + ? = 100
  13. 13.37 + ? = 100
  14. 14.55 + ? = 100
  15. 15.28 + ? = 100
  16. 16.22 + ? = 100
  17. 17.52 + ? = 100
  18. 18.18 + ? = 100
  19. 19.87 + ? = 100
  20. 20.33 + ? = 100
  21. 21.89 + ? = 100
  22. 22.56 + ? = 100
  23. 23.20 + ? = 100
  24. 24.7 + ? = 10
  25. 25.62 + ? = 100
  26. 26.8 + ? = 10
  27. 27.66 + ? = 100
  28. 28.59 + ? = 100
  29. 29.4 + ? = 10
  30. 30.45 + ? = 100
  31. 31.88 + ? = 100
  32. 32.14 + ? = 100
  33. 33.83 + ? = 100
  34. 34.44 + ? = 100
  35. 35.21 + ? = 100
  36. 36.15 + ? = 100
  37. 37.39 + ? = 100
  38. 38.29 + ? = 100
  39. 39.48 + ? = 100
  40. 40.26 + ? = 100

Answer key

  1. 7
  2. 5
  3. 37
  4. 1
  5. 27
  6. 9
  7. 84
  8. 8
  9. 4
  10. 22
  11. 53
  12. 16
  13. 63
  14. 45
  15. 72
  16. 78
  17. 48
  18. 82
  19. 13
  20. 67
  21. 11
  22. 44
  23. 80
  24. 3
  25. 38
  26. 2
  27. 34
  28. 41
  29. 6
  30. 55
  31. 12
  32. 86
  33. 17
  34. 56
  35. 79
  36. 85
  37. 61
  38. 71
  39. 52
  40. 74

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