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Number Bonds Worksheet (to 10 and 100)

Mental maths lesson 1: Number bonds to 10 and 100 · Set 240 · 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. 1.6 + ? = 10
  2. 2.84 + ? = 100
  3. 3.7 + ? = 10
  4. 4.3 + ? = 10
  5. 5.61 + ? = 100
  6. 6.1 + ? = 10
  7. 7.12 + ? = 100
  8. 8.9 + ? = 10
  9. 9.29 + ? = 100
  10. 10.2 + ? = 10
  11. 11.50 + ? = 100
  12. 12.26 + ? = 100
  13. 13.13 + ? = 100
  14. 14.72 + ? = 100
  15. 15.8 + ? = 10
  16. 16.43 + ? = 100
  17. 17.4 + ? = 10
  18. 18.46 + ? = 100
  19. 19.62 + ? = 100
  20. 20.42 + ? = 100
  21. 21.30 + ? = 100
  22. 22.17 + ? = 100
  23. 23.75 + ? = 100
  24. 24.20 + ? = 100
  25. 25.88 + ? = 100
  26. 26.87 + ? = 100
  27. 27.22 + ? = 100
  28. 28.16 + ? = 100
  29. 29.63 + ? = 100
  30. 30.5 + ? = 10
  31. 31.45 + ? = 100
  32. 32.66 + ? = 100
  33. 33.89 + ? = 100
  34. 34.11 + ? = 100
  35. 35.64 + ? = 100
  36. 36.74 + ? = 100
  37. 37.25 + ? = 100
  38. 38.23 + ? = 100
  39. 39.53 + ? = 100
  40. 40.76 + ? = 100

Answer key

  1. 4
  2. 16
  3. 3
  4. 7
  5. 39
  6. 9
  7. 88
  8. 1
  9. 71
  10. 8
  11. 50
  12. 74
  13. 87
  14. 28
  15. 2
  16. 57
  17. 6
  18. 54
  19. 38
  20. 58
  21. 70
  22. 83
  23. 25
  24. 80
  25. 12
  26. 13
  27. 78
  28. 84
  29. 37
  30. 5
  31. 55
  32. 34
  33. 11
  34. 89
  35. 36
  36. 26
  37. 75
  38. 77
  39. 47
  40. 24

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