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Number Bonds Worksheet (to 10 and 100)

Mental maths lesson 1: Number bonds to 10 and 100 · Set 707 · 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. 1.6 + ? = 10
  2. 2.5 + ? = 10
  3. 3.55 + ? = 100
  4. 4.8 + ? = 10
  5. 5.36 + ? = 100
  6. 6.3 + ? = 10
  7. 7.12 + ? = 100
  8. 8.47 + ? = 100
  9. 9.35 + ? = 100
  10. 10.59 + ? = 100
  11. 11.29 + ? = 100
  12. 12.81 + ? = 100
  13. 13.44 + ? = 100
  14. 14.32 + ? = 100
  15. 15.7 + ? = 10
  16. 16.2 + ? = 10
  17. 17.31 + ? = 100
  18. 18.89 + ? = 100
  19. 19.68 + ? = 100
  20. 20.1 + ? = 10
  21. 21.51 + ? = 100
  22. 22.9 + ? = 10
  23. 23.54 + ? = 100
  24. 24.24 + ? = 100
  25. 25.58 + ? = 100
  26. 26.80 + ? = 100
  27. 27.63 + ? = 100
  28. 28.74 + ? = 100
  29. 29.16 + ? = 100
  30. 30.26 + ? = 100
  31. 31.15 + ? = 100
  32. 32.30 + ? = 100
  33. 33.71 + ? = 100
  34. 34.27 + ? = 100
  35. 35.40 + ? = 100
  36. 36.82 + ? = 100
  37. 37.4 + ? = 10
  38. 38.52 + ? = 100
  39. 39.25 + ? = 100
  40. 40.28 + ? = 100

Answer key

  1. 4
  2. 5
  3. 45
  4. 2
  5. 64
  6. 7
  7. 88
  8. 53
  9. 65
  10. 41
  11. 71
  12. 19
  13. 56
  14. 68
  15. 3
  16. 8
  17. 69
  18. 11
  19. 32
  20. 9
  21. 49
  22. 1
  23. 46
  24. 76
  25. 42
  26. 20
  27. 37
  28. 26
  29. 84
  30. 74
  31. 85
  32. 70
  33. 29
  34. 73
  35. 60
  36. 18
  37. 6
  38. 48
  39. 75
  40. 72

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