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Number Bonds Worksheet (to 10 and 100)

Mental maths lesson 1: Number bonds to 10 and 100 · Set 465 · 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. 1.30 + ? = 100
  2. 2.48 + ? = 100
  3. 3.2 + ? = 10
  4. 4.84 + ? = 100
  5. 5.8 + ? = 10
  6. 6.53 + ? = 100
  7. 7.28 + ? = 100
  8. 8.52 + ? = 100
  9. 9.18 + ? = 100
  10. 10.69 + ? = 100
  11. 11.1 + ? = 10
  12. 12.71 + ? = 100
  13. 13.20 + ? = 100
  14. 14.6 + ? = 10
  15. 15.38 + ? = 100
  16. 16.9 + ? = 10
  17. 17.46 + ? = 100
  18. 18.15 + ? = 100
  19. 19.7 + ? = 10
  20. 20.5 + ? = 10
  21. 21.4 + ? = 10
  22. 22.50 + ? = 100
  23. 23.56 + ? = 100
  24. 24.88 + ? = 100
  25. 25.59 + ? = 100
  26. 26.86 + ? = 100
  27. 27.3 + ? = 10
  28. 28.13 + ? = 100
  29. 29.33 + ? = 100
  30. 30.42 + ? = 100
  31. 31.51 + ? = 100
  32. 32.32 + ? = 100
  33. 33.23 + ? = 100
  34. 34.47 + ? = 100
  35. 35.82 + ? = 100
  36. 36.76 + ? = 100
  37. 37.64 + ? = 100
  38. 38.75 + ? = 100
  39. 39.54 + ? = 100
  40. 40.55 + ? = 100

Answer key

  1. 70
  2. 52
  3. 8
  4. 16
  5. 2
  6. 47
  7. 72
  8. 48
  9. 82
  10. 31
  11. 9
  12. 29
  13. 80
  14. 4
  15. 62
  16. 1
  17. 54
  18. 85
  19. 3
  20. 5
  21. 6
  22. 50
  23. 44
  24. 12
  25. 41
  26. 14
  27. 7
  28. 87
  29. 67
  30. 58
  31. 49
  32. 68
  33. 77
  34. 53
  35. 18
  36. 24
  37. 36
  38. 25
  39. 46
  40. 45

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