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Number Bonds Worksheet (to 10 and 100)

Mental maths lesson 1: Number bonds to 10 and 100 · Set 188 · 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. 1.62 + ? = 100
  2. 2.6 + ? = 10
  3. 3.28 + ? = 100
  4. 4.3 + ? = 10
  5. 5.8 + ? = 10
  6. 6.30 + ? = 100
  7. 7.81 + ? = 100
  8. 8.15 + ? = 100
  9. 9.13 + ? = 100
  10. 10.21 + ? = 100
  11. 11.80 + ? = 100
  12. 12.9 + ? = 10
  13. 13.7 + ? = 10
  14. 14.69 + ? = 100
  15. 15.14 + ? = 100
  16. 16.2 + ? = 10
  17. 17.51 + ? = 100
  18. 18.1 + ? = 10
  19. 19.4 + ? = 10
  20. 20.46 + ? = 100
  21. 21.85 + ? = 100
  22. 22.11 + ? = 100
  23. 23.66 + ? = 100
  24. 24.5 + ? = 10
  25. 25.40 + ? = 100
  26. 26.18 + ? = 100
  27. 27.77 + ? = 100
  28. 28.50 + ? = 100
  29. 29.26 + ? = 100
  30. 30.53 + ? = 100
  31. 31.23 + ? = 100
  32. 32.67 + ? = 100
  33. 33.59 + ? = 100
  34. 34.43 + ? = 100
  35. 35.34 + ? = 100
  36. 36.32 + ? = 100
  37. 37.60 + ? = 100
  38. 38.70 + ? = 100
  39. 39.52 + ? = 100
  40. 40.74 + ? = 100

Answer key

  1. 38
  2. 4
  3. 72
  4. 7
  5. 2
  6. 70
  7. 19
  8. 85
  9. 87
  10. 79
  11. 20
  12. 1
  13. 3
  14. 31
  15. 86
  16. 8
  17. 49
  18. 9
  19. 6
  20. 54
  21. 15
  22. 89
  23. 34
  24. 5
  25. 60
  26. 82
  27. 23
  28. 50
  29. 74
  30. 47
  31. 77
  32. 33
  33. 41
  34. 57
  35. 66
  36. 68
  37. 40
  38. 30
  39. 48
  40. 26

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