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Number Bonds Worksheet (to 10 and 100)

Mental maths lesson 1: Number bonds to 10 and 100 · Set 585 · 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. 2.8 + ? = 10
  3. 3.6 + ? = 10
  4. 4.45 + ? = 100
  5. 5.84 + ? = 100
  6. 6.9 + ? = 10
  7. 7.41 + ? = 100
  8. 8.24 + ? = 100
  9. 9.69 + ? = 100
  10. 10.47 + ? = 100
  11. 11.4 + ? = 10
  12. 12.39 + ? = 100
  13. 13.5 + ? = 10
  14. 14.43 + ? = 100
  15. 15.2 + ? = 10
  16. 16.36 + ? = 100
  17. 17.1 + ? = 10
  18. 18.7 + ? = 10
  19. 19.29 + ? = 100
  20. 20.57 + ? = 100
  21. 21.17 + ? = 100
  22. 22.85 + ? = 100
  23. 23.53 + ? = 100
  24. 24.30 + ? = 100
  25. 25.78 + ? = 100
  26. 26.11 + ? = 100
  27. 27.64 + ? = 100
  28. 28.59 + ? = 100
  29. 29.12 + ? = 100
  30. 30.51 + ? = 100
  31. 31.35 + ? = 100
  32. 32.71 + ? = 100
  33. 33.27 + ? = 100
  34. 34.22 + ? = 100
  35. 35.46 + ? = 100
  36. 36.80 + ? = 100
  37. 37.86 + ? = 100
  38. 38.19 + ? = 100
  39. 39.23 + ? = 100
  40. 40.16 + ? = 100

Answer key

  1. 7
  2. 2
  3. 4
  4. 55
  5. 16
  6. 1
  7. 59
  8. 76
  9. 31
  10. 53
  11. 6
  12. 61
  13. 5
  14. 57
  15. 8
  16. 64
  17. 9
  18. 3
  19. 71
  20. 43
  21. 83
  22. 15
  23. 47
  24. 70
  25. 22
  26. 89
  27. 36
  28. 41
  29. 88
  30. 49
  31. 65
  32. 29
  33. 73
  34. 78
  35. 54
  36. 20
  37. 14
  38. 81
  39. 77
  40. 84

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