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Number Bonds Worksheet (to 10 and 100)

Mental maths lesson 1: Number bonds to 10 and 100 · Set 778 · 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. 1.13 + ? = 100
  2. 2.51 + ? = 100
  3. 3.5 + ? = 10
  4. 4.58 + ? = 100
  5. 5.1 + ? = 10
  6. 6.73 + ? = 100
  7. 7.11 + ? = 100
  8. 8.28 + ? = 100
  9. 9.84 + ? = 100
  10. 10.49 + ? = 100
  11. 11.7 + ? = 10
  12. 12.17 + ? = 100
  13. 13.8 + ? = 10
  14. 14.60 + ? = 100
  15. 15.21 + ? = 100
  16. 16.76 + ? = 100
  17. 17.4 + ? = 10
  18. 18.81 + ? = 100
  19. 19.40 + ? = 100
  20. 20.31 + ? = 100
  21. 21.36 + ? = 100
  22. 22.3 + ? = 10
  23. 23.2 + ? = 10
  24. 24.6 + ? = 10
  25. 25.9 + ? = 10
  26. 26.85 + ? = 100
  27. 27.43 + ? = 100
  28. 28.52 + ? = 100
  29. 29.45 + ? = 100
  30. 30.75 + ? = 100
  31. 31.35 + ? = 100
  32. 32.67 + ? = 100
  33. 33.61 + ? = 100
  34. 34.15 + ? = 100
  35. 35.42 + ? = 100
  36. 36.19 + ? = 100
  37. 37.77 + ? = 100
  38. 38.53 + ? = 100
  39. 39.55 + ? = 100
  40. 40.23 + ? = 100

Answer key

  1. 87
  2. 49
  3. 5
  4. 42
  5. 9
  6. 27
  7. 89
  8. 72
  9. 16
  10. 51
  11. 3
  12. 83
  13. 2
  14. 40
  15. 79
  16. 24
  17. 6
  18. 19
  19. 60
  20. 69
  21. 64
  22. 7
  23. 8
  24. 4
  25. 1
  26. 15
  27. 57
  28. 48
  29. 55
  30. 25
  31. 65
  32. 33
  33. 39
  34. 85
  35. 58
  36. 81
  37. 23
  38. 47
  39. 45
  40. 77

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