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Number Bonds Worksheet (to 10 and 100)

Mental maths lesson 1: Number bonds to 10 and 100 · Set 533 · 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. 1.1 + ? = 10
  2. 2.4 + ? = 10
  3. 3.9 + ? = 10
  4. 4.72 + ? = 100
  5. 5.84 + ? = 100
  6. 6.8 + ? = 10
  7. 7.6 + ? = 10
  8. 8.22 + ? = 100
  9. 9.86 + ? = 100
  10. 10.66 + ? = 100
  11. 11.2 + ? = 10
  12. 12.36 + ? = 100
  13. 13.17 + ? = 100
  14. 14.76 + ? = 100
  15. 15.80 + ? = 100
  16. 16.35 + ? = 100
  17. 17.24 + ? = 100
  18. 18.60 + ? = 100
  19. 19.23 + ? = 100
  20. 20.5 + ? = 10
  21. 21.55 + ? = 100
  22. 22.7 + ? = 10
  23. 23.57 + ? = 100
  24. 24.74 + ? = 100
  25. 25.51 + ? = 100
  26. 26.3 + ? = 10
  27. 27.32 + ? = 100
  28. 28.34 + ? = 100
  29. 29.16 + ? = 100
  30. 30.40 + ? = 100
  31. 31.85 + ? = 100
  32. 32.26 + ? = 100
  33. 33.59 + ? = 100
  34. 34.37 + ? = 100
  35. 35.39 + ? = 100
  36. 36.58 + ? = 100
  37. 37.43 + ? = 100
  38. 38.18 + ? = 100
  39. 39.20 + ? = 100
  40. 40.31 + ? = 100

Answer key

  1. 9
  2. 6
  3. 1
  4. 28
  5. 16
  6. 2
  7. 4
  8. 78
  9. 14
  10. 34
  11. 8
  12. 64
  13. 83
  14. 24
  15. 20
  16. 65
  17. 76
  18. 40
  19. 77
  20. 5
  21. 45
  22. 3
  23. 43
  24. 26
  25. 49
  26. 7
  27. 68
  28. 66
  29. 84
  30. 60
  31. 15
  32. 74
  33. 41
  34. 63
  35. 61
  36. 42
  37. 57
  38. 82
  39. 80
  40. 69

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