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Number Bonds Worksheet (to 10 and 100)

Mental maths lesson 1: Number bonds to 10 and 100 · Set 92 · 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. 1.1 + ? = 10
  2. 2.66 + ? = 100
  3. 3.5 + ? = 10
  4. 4.14 + ? = 100
  5. 5.8 + ? = 10
  6. 6.2 + ? = 10
  7. 7.4 + ? = 10
  8. 8.6 + ? = 10
  9. 9.3 + ? = 10
  10. 10.7 + ? = 10
  11. 11.86 + ? = 100
  12. 12.80 + ? = 100
  13. 13.22 + ? = 100
  14. 14.30 + ? = 100
  15. 15.51 + ? = 100
  16. 16.46 + ? = 100
  17. 17.17 + ? = 100
  18. 18.74 + ? = 100
  19. 19.44 + ? = 100
  20. 20.15 + ? = 100
  21. 21.26 + ? = 100
  22. 22.31 + ? = 100
  23. 23.54 + ? = 100
  24. 24.79 + ? = 100
  25. 25.43 + ? = 100
  26. 26.28 + ? = 100
  27. 27.23 + ? = 100
  28. 28.81 + ? = 100
  29. 29.53 + ? = 100
  30. 30.57 + ? = 100
  31. 31.52 + ? = 100
  32. 32.83 + ? = 100
  33. 33.9 + ? = 10
  34. 34.85 + ? = 100
  35. 35.48 + ? = 100
  36. 36.24 + ? = 100
  37. 37.19 + ? = 100
  38. 38.58 + ? = 100
  39. 39.84 + ? = 100
  40. 40.55 + ? = 100

Answer key

  1. 9
  2. 34
  3. 5
  4. 86
  5. 2
  6. 8
  7. 6
  8. 4
  9. 7
  10. 3
  11. 14
  12. 20
  13. 78
  14. 70
  15. 49
  16. 54
  17. 83
  18. 26
  19. 56
  20. 85
  21. 74
  22. 69
  23. 46
  24. 21
  25. 57
  26. 72
  27. 77
  28. 19
  29. 47
  30. 43
  31. 48
  32. 17
  33. 1
  34. 15
  35. 52
  36. 76
  37. 81
  38. 42
  39. 16
  40. 45

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