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Number Bonds Worksheet (to 10 and 100)

Mental maths lesson 1: Number bonds to 10 and 100 · Set 268 · 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. 1.82 + ? = 100
  2. 2.5 + ? = 10
  3. 3.7 + ? = 10
  4. 4.84 + ? = 100
  5. 5.54 + ? = 100
  6. 6.1 + ? = 10
  7. 7.25 + ? = 100
  8. 8.37 + ? = 100
  9. 9.26 + ? = 100
  10. 10.28 + ? = 100
  11. 11.46 + ? = 100
  12. 12.6 + ? = 10
  13. 13.56 + ? = 100
  14. 14.2 + ? = 10
  15. 15.50 + ? = 100
  16. 16.58 + ? = 100
  17. 17.88 + ? = 100
  18. 18.17 + ? = 100
  19. 19.3 + ? = 10
  20. 20.11 + ? = 100
  21. 21.38 + ? = 100
  22. 22.79 + ? = 100
  23. 23.63 + ? = 100
  24. 24.55 + ? = 100
  25. 25.44 + ? = 100
  26. 26.4 + ? = 10
  27. 27.51 + ? = 100
  28. 28.53 + ? = 100
  29. 29.8 + ? = 10
  30. 30.24 + ? = 100
  31. 31.74 + ? = 100
  32. 32.87 + ? = 100
  33. 33.30 + ? = 100
  34. 34.70 + ? = 100
  35. 35.39 + ? = 100
  36. 36.35 + ? = 100
  37. 37.23 + ? = 100
  38. 38.9 + ? = 10
  39. 39.86 + ? = 100
  40. 40.73 + ? = 100

Answer key

  1. 18
  2. 5
  3. 3
  4. 16
  5. 46
  6. 9
  7. 75
  8. 63
  9. 74
  10. 72
  11. 54
  12. 4
  13. 44
  14. 8
  15. 50
  16. 42
  17. 12
  18. 83
  19. 7
  20. 89
  21. 62
  22. 21
  23. 37
  24. 45
  25. 56
  26. 6
  27. 49
  28. 47
  29. 2
  30. 76
  31. 26
  32. 13
  33. 70
  34. 30
  35. 61
  36. 65
  37. 77
  38. 1
  39. 14
  40. 27

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