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Number Bonds Worksheet (to 10 and 100)

Mental maths lesson 1: Number bonds to 10 and 100 · Set 302 · 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. 1.5 + ? = 10
  2. 2.2 + ? = 10
  3. 3.28 + ? = 100
  4. 4.7 + ? = 10
  5. 5.3 + ? = 10
  6. 6.6 + ? = 10
  7. 7.29 + ? = 100
  8. 8.37 + ? = 100
  9. 9.82 + ? = 100
  10. 10.8 + ? = 10
  11. 11.4 + ? = 10
  12. 12.12 + ? = 100
  13. 13.39 + ? = 100
  14. 14.62 + ? = 100
  15. 15.9 + ? = 10
  16. 16.1 + ? = 10
  17. 17.31 + ? = 100
  18. 18.85 + ? = 100
  19. 19.22 + ? = 100
  20. 20.79 + ? = 100
  21. 21.59 + ? = 100
  22. 22.65 + ? = 100
  23. 23.53 + ? = 100
  24. 24.71 + ? = 100
  25. 25.33 + ? = 100
  26. 26.68 + ? = 100
  27. 27.25 + ? = 100
  28. 28.49 + ? = 100
  29. 29.67 + ? = 100
  30. 30.40 + ? = 100
  31. 31.20 + ? = 100
  32. 32.57 + ? = 100
  33. 33.11 + ? = 100
  34. 34.52 + ? = 100
  35. 35.30 + ? = 100
  36. 36.66 + ? = 100
  37. 37.21 + ? = 100
  38. 38.47 + ? = 100
  39. 39.84 + ? = 100
  40. 40.88 + ? = 100

Answer key

  1. 5
  2. 8
  3. 72
  4. 3
  5. 7
  6. 4
  7. 71
  8. 63
  9. 18
  10. 2
  11. 6
  12. 88
  13. 61
  14. 38
  15. 1
  16. 9
  17. 69
  18. 15
  19. 78
  20. 21
  21. 41
  22. 35
  23. 47
  24. 29
  25. 67
  26. 32
  27. 75
  28. 51
  29. 33
  30. 60
  31. 80
  32. 43
  33. 89
  34. 48
  35. 70
  36. 34
  37. 79
  38. 53
  39. 16
  40. 12

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