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Number Bonds Worksheet (to 10 and 100)

Mental maths lesson 1: Number bonds to 10 and 100 · Set 982 · 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. 1.3 + ? = 10
  2. 2.1 + ? = 10
  3. 3.75 + ? = 100
  4. 4.58 + ? = 100
  5. 5.21 + ? = 100
  6. 6.31 + ? = 100
  7. 7.45 + ? = 100
  8. 8.8 + ? = 10
  9. 9.9 + ? = 10
  10. 10.7 + ? = 10
  11. 11.5 + ? = 10
  12. 12.25 + ? = 100
  13. 13.50 + ? = 100
  14. 14.17 + ? = 100
  15. 15.4 + ? = 10
  16. 16.6 + ? = 10
  17. 17.12 + ? = 100
  18. 18.2 + ? = 10
  19. 19.24 + ? = 100
  20. 20.33 + ? = 100
  21. 21.66 + ? = 100
  22. 22.40 + ? = 100
  23. 23.79 + ? = 100
  24. 24.36 + ? = 100
  25. 25.53 + ? = 100
  26. 26.62 + ? = 100
  27. 27.38 + ? = 100
  28. 28.70 + ? = 100
  29. 29.37 + ? = 100
  30. 30.74 + ? = 100
  31. 31.11 + ? = 100
  32. 32.80 + ? = 100
  33. 33.52 + ? = 100
  34. 34.56 + ? = 100
  35. 35.30 + ? = 100
  36. 36.73 + ? = 100
  37. 37.20 + ? = 100
  38. 38.59 + ? = 100
  39. 39.54 + ? = 100
  40. 40.89 + ? = 100

Answer key

  1. 7
  2. 9
  3. 25
  4. 42
  5. 79
  6. 69
  7. 55
  8. 2
  9. 1
  10. 3
  11. 5
  12. 75
  13. 50
  14. 83
  15. 6
  16. 4
  17. 88
  18. 8
  19. 76
  20. 67
  21. 34
  22. 60
  23. 21
  24. 64
  25. 47
  26. 38
  27. 62
  28. 30
  29. 63
  30. 26
  31. 89
  32. 20
  33. 48
  34. 44
  35. 70
  36. 27
  37. 80
  38. 41
  39. 46
  40. 11

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