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Number Bonds Worksheet (to 10 and 100)

Mental maths lesson 1: Number bonds to 10 and 100 · Set 528 · 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. 1.72 + ? = 100
  2. 2.62 + ? = 100
  3. 3.8 + ? = 10
  4. 4.65 + ? = 100
  5. 5.2 + ? = 10
  6. 6.57 + ? = 100
  7. 7.9 + ? = 10
  8. 8.21 + ? = 100
  9. 9.35 + ? = 100
  10. 10.28 + ? = 100
  11. 11.6 + ? = 10
  12. 12.1 + ? = 10
  13. 13.36 + ? = 100
  14. 14.37 + ? = 100
  15. 15.4 + ? = 10
  16. 16.86 + ? = 100
  17. 17.67 + ? = 100
  18. 18.64 + ? = 100
  19. 19.7 + ? = 10
  20. 20.5 + ? = 10
  21. 21.45 + ? = 100
  22. 22.29 + ? = 100
  23. 23.77 + ? = 100
  24. 24.15 + ? = 100
  25. 25.3 + ? = 10
  26. 26.68 + ? = 100
  27. 27.55 + ? = 100
  28. 28.23 + ? = 100
  29. 29.81 + ? = 100
  30. 30.47 + ? = 100
  31. 31.83 + ? = 100
  32. 32.32 + ? = 100
  33. 33.82 + ? = 100
  34. 34.38 + ? = 100
  35. 35.85 + ? = 100
  36. 36.25 + ? = 100
  37. 37.40 + ? = 100
  38. 38.79 + ? = 100
  39. 39.50 + ? = 100
  40. 40.48 + ? = 100

Answer key

  1. 28
  2. 38
  3. 2
  4. 35
  5. 8
  6. 43
  7. 1
  8. 79
  9. 65
  10. 72
  11. 4
  12. 9
  13. 64
  14. 63
  15. 6
  16. 14
  17. 33
  18. 36
  19. 3
  20. 5
  21. 55
  22. 71
  23. 23
  24. 85
  25. 7
  26. 32
  27. 45
  28. 77
  29. 19
  30. 53
  31. 17
  32. 68
  33. 18
  34. 62
  35. 15
  36. 75
  37. 60
  38. 21
  39. 50
  40. 52

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