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Number Bonds Worksheet (to 10 and 100)

Mental maths lesson 1: Number bonds to 10 and 100 · Set 130 · 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. 2.26 + ? = 100
  3. 3.64 + ? = 100
  4. 4.2 + ? = 10
  5. 5.53 + ? = 100
  6. 6.18 + ? = 100
  7. 7.4 + ? = 10
  8. 8.20 + ? = 100
  9. 9.37 + ? = 100
  10. 10.1 + ? = 10
  11. 11.3 + ? = 10
  12. 12.88 + ? = 100
  13. 13.79 + ? = 100
  14. 14.9 + ? = 10
  15. 15.74 + ? = 100
  16. 16.62 + ? = 100
  17. 17.85 + ? = 100
  18. 18.5 + ? = 10
  19. 19.48 + ? = 100
  20. 20.75 + ? = 100
  21. 21.84 + ? = 100
  22. 22.6 + ? = 10
  23. 23.63 + ? = 100
  24. 24.8 + ? = 10
  25. 25.57 + ? = 100
  26. 26.69 + ? = 100
  27. 27.47 + ? = 100
  28. 28.41 + ? = 100
  29. 29.12 + ? = 100
  30. 30.71 + ? = 100
  31. 31.30 + ? = 100
  32. 32.16 + ? = 100
  33. 33.15 + ? = 100
  34. 34.77 + ? = 100
  35. 35.72 + ? = 100
  36. 36.27 + ? = 100
  37. 37.70 + ? = 100
  38. 38.87 + ? = 100
  39. 39.25 + ? = 100
  40. 40.80 + ? = 100

Answer key

  1. 3
  2. 74
  3. 36
  4. 8
  5. 47
  6. 82
  7. 6
  8. 80
  9. 63
  10. 9
  11. 7
  12. 12
  13. 21
  14. 1
  15. 26
  16. 38
  17. 15
  18. 5
  19. 52
  20. 25
  21. 16
  22. 4
  23. 37
  24. 2
  25. 43
  26. 31
  27. 53
  28. 59
  29. 88
  30. 29
  31. 70
  32. 84
  33. 85
  34. 23
  35. 28
  36. 73
  37. 30
  38. 13
  39. 75
  40. 20

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