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Number Bonds Worksheet (to 10 and 100)

Mental maths lesson 1: Number bonds to 10 and 100 · Set 14 · 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. 1.7 + ? = 10
  2. 2.76 + ? = 100
  3. 3.61 + ? = 100
  4. 4.28 + ? = 100
  5. 5.47 + ? = 100
  6. 6.84 + ? = 100
  7. 7.63 + ? = 100
  8. 8.69 + ? = 100
  9. 9.11 + ? = 100
  10. 10.77 + ? = 100
  11. 11.36 + ? = 100
  12. 12.81 + ? = 100
  13. 13.5 + ? = 10
  14. 14.2 + ? = 10
  15. 15.31 + ? = 100
  16. 16.80 + ? = 100
  17. 17.3 + ? = 10
  18. 18.50 + ? = 100
  19. 19.12 + ? = 100
  20. 20.44 + ? = 100
  21. 21.18 + ? = 100
  22. 22.1 + ? = 10
  23. 23.19 + ? = 100
  24. 24.30 + ? = 100
  25. 25.88 + ? = 100
  26. 26.4 + ? = 10
  27. 27.9 + ? = 10
  28. 28.14 + ? = 100
  29. 29.22 + ? = 100
  30. 30.29 + ? = 100
  31. 31.8 + ? = 10
  32. 32.75 + ? = 100
  33. 33.6 + ? = 10
  34. 34.54 + ? = 100
  35. 35.16 + ? = 100
  36. 36.64 + ? = 100
  37. 37.73 + ? = 100
  38. 38.38 + ? = 100
  39. 39.83 + ? = 100
  40. 40.33 + ? = 100

Answer key

  1. 3
  2. 24
  3. 39
  4. 72
  5. 53
  6. 16
  7. 37
  8. 31
  9. 89
  10. 23
  11. 64
  12. 19
  13. 5
  14. 8
  15. 69
  16. 20
  17. 7
  18. 50
  19. 88
  20. 56
  21. 82
  22. 9
  23. 81
  24. 70
  25. 12
  26. 6
  27. 1
  28. 86
  29. 78
  30. 71
  31. 2
  32. 25
  33. 4
  34. 46
  35. 84
  36. 36
  37. 27
  38. 62
  39. 17
  40. 67

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