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Number Bonds Worksheet (to 10 and 100)

Mental maths lesson 1: Number bonds to 10 and 100 · Set 183 · 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. 1.12 + ? = 100
  2. 2.8 + ? = 10
  3. 3.6 + ? = 10
  4. 4.38 + ? = 100
  5. 5.7 + ? = 10
  6. 6.1 + ? = 10
  7. 7.88 + ? = 100
  8. 8.41 + ? = 100
  9. 9.9 + ? = 10
  10. 10.34 + ? = 100
  11. 11.27 + ? = 100
  12. 12.46 + ? = 100
  13. 13.81 + ? = 100
  14. 14.4 + ? = 10
  15. 15.60 + ? = 100
  16. 16.18 + ? = 100
  17. 17.54 + ? = 100
  18. 18.37 + ? = 100
  19. 19.33 + ? = 100
  20. 20.11 + ? = 100
  21. 21.62 + ? = 100
  22. 22.25 + ? = 100
  23. 23.42 + ? = 100
  24. 24.52 + ? = 100
  25. 25.2 + ? = 10
  26. 26.36 + ? = 100
  27. 27.58 + ? = 100
  28. 28.30 + ? = 100
  29. 29.39 + ? = 100
  30. 30.80 + ? = 100
  31. 31.77 + ? = 100
  32. 32.79 + ? = 100
  33. 33.3 + ? = 10
  34. 34.61 + ? = 100
  35. 35.31 + ? = 100
  36. 36.24 + ? = 100
  37. 37.47 + ? = 100
  38. 38.44 + ? = 100
  39. 39.53 + ? = 100
  40. 40.82 + ? = 100

Answer key

  1. 88
  2. 2
  3. 4
  4. 62
  5. 3
  6. 9
  7. 12
  8. 59
  9. 1
  10. 66
  11. 73
  12. 54
  13. 19
  14. 6
  15. 40
  16. 82
  17. 46
  18. 63
  19. 67
  20. 89
  21. 38
  22. 75
  23. 58
  24. 48
  25. 8
  26. 64
  27. 42
  28. 70
  29. 61
  30. 20
  31. 23
  32. 21
  33. 7
  34. 39
  35. 69
  36. 76
  37. 53
  38. 56
  39. 47
  40. 18

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