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Number Bonds Worksheet (to 10 and 100)

Mental maths lesson 1: Number bonds to 10 and 100 · Set 577 · 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. 2.18 + ? = 100
  3. 3.12 + ? = 100
  4. 4.8 + ? = 10
  5. 5.2 + ? = 10
  6. 6.22 + ? = 100
  7. 7.25 + ? = 100
  8. 8.17 + ? = 100
  9. 9.35 + ? = 100
  10. 10.4 + ? = 10
  11. 11.82 + ? = 100
  12. 12.5 + ? = 10
  13. 13.84 + ? = 100
  14. 14.3 + ? = 10
  15. 15.16 + ? = 100
  16. 16.7 + ? = 10
  17. 17.9 + ? = 10
  18. 18.73 + ? = 100
  19. 19.6 + ? = 10
  20. 20.40 + ? = 100
  21. 21.89 + ? = 100
  22. 22.71 + ? = 100
  23. 23.74 + ? = 100
  24. 24.61 + ? = 100
  25. 25.14 + ? = 100
  26. 26.67 + ? = 100
  27. 27.46 + ? = 100
  28. 28.60 + ? = 100
  29. 29.37 + ? = 100
  30. 30.28 + ? = 100
  31. 31.43 + ? = 100
  32. 32.52 + ? = 100
  33. 33.45 + ? = 100
  34. 34.55 + ? = 100
  35. 35.62 + ? = 100
  36. 36.58 + ? = 100
  37. 37.65 + ? = 100
  38. 38.23 + ? = 100
  39. 39.51 + ? = 100
  40. 40.31 + ? = 100

Answer key

  1. 9
  2. 82
  3. 88
  4. 2
  5. 8
  6. 78
  7. 75
  8. 83
  9. 65
  10. 6
  11. 18
  12. 5
  13. 16
  14. 7
  15. 84
  16. 3
  17. 1
  18. 27
  19. 4
  20. 60
  21. 11
  22. 29
  23. 26
  24. 39
  25. 86
  26. 33
  27. 54
  28. 40
  29. 63
  30. 72
  31. 57
  32. 48
  33. 55
  34. 45
  35. 38
  36. 42
  37. 35
  38. 77
  39. 49
  40. 69

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