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Number Bonds Worksheet (to 10 and 100)

Mental maths lesson 1: Number bonds to 10 and 100 · Set 157 · 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. 1.68 + ? = 100
  2. 2.61 + ? = 100
  3. 3.82 + ? = 100
  4. 4.20 + ? = 100
  5. 5.31 + ? = 100
  6. 6.44 + ? = 100
  7. 7.9 + ? = 10
  8. 8.3 + ? = 10
  9. 9.1 + ? = 10
  10. 10.32 + ? = 100
  11. 11.89 + ? = 100
  12. 12.84 + ? = 100
  13. 13.30 + ? = 100
  14. 14.2 + ? = 10
  15. 15.8 + ? = 10
  16. 16.5 + ? = 10
  17. 17.55 + ? = 100
  18. 18.12 + ? = 100
  19. 19.28 + ? = 100
  20. 20.74 + ? = 100
  21. 21.23 + ? = 100
  22. 22.39 + ? = 100
  23. 23.51 + ? = 100
  24. 24.45 + ? = 100
  25. 25.7 + ? = 10
  26. 26.86 + ? = 100
  27. 27.66 + ? = 100
  28. 28.11 + ? = 100
  29. 29.58 + ? = 100
  30. 30.50 + ? = 100
  31. 31.35 + ? = 100
  32. 32.25 + ? = 100
  33. 33.6 + ? = 10
  34. 34.79 + ? = 100
  35. 35.15 + ? = 100
  36. 36.34 + ? = 100
  37. 37.33 + ? = 100
  38. 38.88 + ? = 100
  39. 39.87 + ? = 100
  40. 40.63 + ? = 100

Answer key

  1. 32
  2. 39
  3. 18
  4. 80
  5. 69
  6. 56
  7. 1
  8. 7
  9. 9
  10. 68
  11. 11
  12. 16
  13. 70
  14. 8
  15. 2
  16. 5
  17. 45
  18. 88
  19. 72
  20. 26
  21. 77
  22. 61
  23. 49
  24. 55
  25. 3
  26. 14
  27. 34
  28. 89
  29. 42
  30. 50
  31. 65
  32. 75
  33. 4
  34. 21
  35. 85
  36. 66
  37. 67
  38. 12
  39. 13
  40. 37

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