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Number Bonds Worksheet (to 10 and 100)

Mental maths lesson 1: Number bonds to 10 and 100 · Set 415 · 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. 2.8 + ? = 10
  3. 3.2 + ? = 10
  4. 4.73 + ? = 100
  5. 5.7 + ? = 10
  6. 6.85 + ? = 100
  7. 7.4 + ? = 10
  8. 8.76 + ? = 100
  9. 9.31 + ? = 100
  10. 10.69 + ? = 100
  11. 11.5 + ? = 10
  12. 12.6 + ? = 10
  13. 13.50 + ? = 100
  14. 14.26 + ? = 100
  15. 15.30 + ? = 100
  16. 16.82 + ? = 100
  17. 17.59 + ? = 100
  18. 18.56 + ? = 100
  19. 19.23 + ? = 100
  20. 20.41 + ? = 100
  21. 21.14 + ? = 100
  22. 22.1 + ? = 10
  23. 23.54 + ? = 100
  24. 24.60 + ? = 100
  25. 25.43 + ? = 100
  26. 26.66 + ? = 100
  27. 27.38 + ? = 100
  28. 28.11 + ? = 100
  29. 29.88 + ? = 100
  30. 30.9 + ? = 10
  31. 31.70 + ? = 100
  32. 32.72 + ? = 100
  33. 33.19 + ? = 100
  34. 34.51 + ? = 100
  35. 35.37 + ? = 100
  36. 36.46 + ? = 100
  37. 37.64 + ? = 100
  38. 38.86 + ? = 100
  39. 39.42 + ? = 100
  40. 40.84 + ? = 100

Answer key

  1. 7
  2. 2
  3. 8
  4. 27
  5. 3
  6. 15
  7. 6
  8. 24
  9. 69
  10. 31
  11. 5
  12. 4
  13. 50
  14. 74
  15. 70
  16. 18
  17. 41
  18. 44
  19. 77
  20. 59
  21. 86
  22. 9
  23. 46
  24. 40
  25. 57
  26. 34
  27. 62
  28. 89
  29. 12
  30. 1
  31. 30
  32. 28
  33. 81
  34. 49
  35. 63
  36. 54
  37. 36
  38. 14
  39. 58
  40. 16

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