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Number Bonds Worksheet (to 10 and 100)

Mental maths lesson 1: Number bonds to 10 and 100 · Set 180 · 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. 1.33 + ? = 100
  2. 2.9 + ? = 10
  3. 3.24 + ? = 100
  4. 4.55 + ? = 100
  5. 5.73 + ? = 100
  6. 6.4 + ? = 10
  7. 7.29 + ? = 100
  8. 8.28 + ? = 100
  9. 9.40 + ? = 100
  10. 10.14 + ? = 100
  11. 11.62 + ? = 100
  12. 12.59 + ? = 100
  13. 13.22 + ? = 100
  14. 14.1 + ? = 10
  15. 15.85 + ? = 100
  16. 16.57 + ? = 100
  17. 17.2 + ? = 10
  18. 18.21 + ? = 100
  19. 19.44 + ? = 100
  20. 20.6 + ? = 10
  21. 21.79 + ? = 100
  22. 22.5 + ? = 10
  23. 23.70 + ? = 100
  24. 24.37 + ? = 100
  25. 25.52 + ? = 100
  26. 26.7 + ? = 10
  27. 27.26 + ? = 100
  28. 28.27 + ? = 100
  29. 29.3 + ? = 10
  30. 30.47 + ? = 100
  31. 31.38 + ? = 100
  32. 32.75 + ? = 100
  33. 33.20 + ? = 100
  34. 34.80 + ? = 100
  35. 35.49 + ? = 100
  36. 36.84 + ? = 100
  37. 37.86 + ? = 100
  38. 38.56 + ? = 100
  39. 39.13 + ? = 100
  40. 40.58 + ? = 100

Answer key

  1. 67
  2. 1
  3. 76
  4. 45
  5. 27
  6. 6
  7. 71
  8. 72
  9. 60
  10. 86
  11. 38
  12. 41
  13. 78
  14. 9
  15. 15
  16. 43
  17. 8
  18. 79
  19. 56
  20. 4
  21. 21
  22. 5
  23. 30
  24. 63
  25. 48
  26. 3
  27. 74
  28. 73
  29. 7
  30. 53
  31. 62
  32. 25
  33. 80
  34. 20
  35. 51
  36. 16
  37. 14
  38. 44
  39. 87
  40. 42

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