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Number Bonds Worksheet (to 10 and 100)

Mental maths lesson 1: Number bonds to 10 and 100 · Set 295 · 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. 1.8 + ? = 10
  2. 2.32 + ? = 100
  3. 3.4 + ? = 10
  4. 4.5 + ? = 10
  5. 5.3 + ? = 10
  6. 6.9 + ? = 10
  7. 7.44 + ? = 100
  8. 8.1 + ? = 10
  9. 9.2 + ? = 10
  10. 10.6 + ? = 10
  11. 11.84 + ? = 100
  12. 12.7 + ? = 10
  13. 13.42 + ? = 100
  14. 14.59 + ? = 100
  15. 15.46 + ? = 100
  16. 16.62 + ? = 100
  17. 17.64 + ? = 100
  18. 18.51 + ? = 100
  19. 19.19 + ? = 100
  20. 20.77 + ? = 100
  21. 21.40 + ? = 100
  22. 22.22 + ? = 100
  23. 23.24 + ? = 100
  24. 24.17 + ? = 100
  25. 25.47 + ? = 100
  26. 26.81 + ? = 100
  27. 27.37 + ? = 100
  28. 28.15 + ? = 100
  29. 29.33 + ? = 100
  30. 30.88 + ? = 100
  31. 31.23 + ? = 100
  32. 32.11 + ? = 100
  33. 33.78 + ? = 100
  34. 34.61 + ? = 100
  35. 35.67 + ? = 100
  36. 36.21 + ? = 100
  37. 37.60 + ? = 100
  38. 38.80 + ? = 100
  39. 39.85 + ? = 100
  40. 40.14 + ? = 100

Answer key

  1. 2
  2. 68
  3. 6
  4. 5
  5. 7
  6. 1
  7. 56
  8. 9
  9. 8
  10. 4
  11. 16
  12. 3
  13. 58
  14. 41
  15. 54
  16. 38
  17. 36
  18. 49
  19. 81
  20. 23
  21. 60
  22. 78
  23. 76
  24. 83
  25. 53
  26. 19
  27. 63
  28. 85
  29. 67
  30. 12
  31. 77
  32. 89
  33. 22
  34. 39
  35. 33
  36. 79
  37. 40
  38. 20
  39. 15
  40. 86

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