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Number Bonds Worksheet (to 10 and 100)

Mental maths lesson 1: Number bonds to 10 and 100 · Set 534 · 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. 1.32 + ? = 100
  2. 2.46 + ? = 100
  3. 3.16 + ? = 100
  4. 4.7 + ? = 10
  5. 5.3 + ? = 10
  6. 6.82 + ? = 100
  7. 7.6 + ? = 10
  8. 8.33 + ? = 100
  9. 9.20 + ? = 100
  10. 10.2 + ? = 10
  11. 11.61 + ? = 100
  12. 12.68 + ? = 100
  13. 13.9 + ? = 10
  14. 14.37 + ? = 100
  15. 15.55 + ? = 100
  16. 16.8 + ? = 10
  17. 17.63 + ? = 100
  18. 18.5 + ? = 10
  19. 19.11 + ? = 100
  20. 20.77 + ? = 100
  21. 21.88 + ? = 100
  22. 22.52 + ? = 100
  23. 23.23 + ? = 100
  24. 24.66 + ? = 100
  25. 25.1 + ? = 10
  26. 26.15 + ? = 100
  27. 27.12 + ? = 100
  28. 28.38 + ? = 100
  29. 29.27 + ? = 100
  30. 30.25 + ? = 100
  31. 31.43 + ? = 100
  32. 32.67 + ? = 100
  33. 33.81 + ? = 100
  34. 34.17 + ? = 100
  35. 35.41 + ? = 100
  36. 36.39 + ? = 100
  37. 37.83 + ? = 100
  38. 38.71 + ? = 100
  39. 39.30 + ? = 100
  40. 40.45 + ? = 100

Answer key

  1. 68
  2. 54
  3. 84
  4. 3
  5. 7
  6. 18
  7. 4
  8. 67
  9. 80
  10. 8
  11. 39
  12. 32
  13. 1
  14. 63
  15. 45
  16. 2
  17. 37
  18. 5
  19. 89
  20. 23
  21. 12
  22. 48
  23. 77
  24. 34
  25. 9
  26. 85
  27. 88
  28. 62
  29. 73
  30. 75
  31. 57
  32. 33
  33. 19
  34. 83
  35. 59
  36. 61
  37. 17
  38. 29
  39. 70
  40. 55

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