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Number Bonds Worksheet (to 10 and 100)

Mental maths lesson 1: Number bonds to 10 and 100 · Set 381 · 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. 1.7 + ? = 10
  2. 2.86 + ? = 100
  3. 3.30 + ? = 100
  4. 4.59 + ? = 100
  5. 5.2 + ? = 10
  6. 6.65 + ? = 100
  7. 7.73 + ? = 100
  8. 8.78 + ? = 100
  9. 9.46 + ? = 100
  10. 10.37 + ? = 100
  11. 11.39 + ? = 100
  12. 12.89 + ? = 100
  13. 13.3 + ? = 10
  14. 14.22 + ? = 100
  15. 15.5 + ? = 10
  16. 16.63 + ? = 100
  17. 17.8 + ? = 10
  18. 18.67 + ? = 100
  19. 19.1 + ? = 10
  20. 20.71 + ? = 100
  21. 21.11 + ? = 100
  22. 22.24 + ? = 100
  23. 23.33 + ? = 100
  24. 24.4 + ? = 10
  25. 25.80 + ? = 100
  26. 26.6 + ? = 10
  27. 27.34 + ? = 100
  28. 28.66 + ? = 100
  29. 29.43 + ? = 100
  30. 30.85 + ? = 100
  31. 31.58 + ? = 100
  32. 32.22 + ? = 100
  33. 33.76 + ? = 100
  34. 34.64 + ? = 100
  35. 35.14 + ? = 100
  36. 36.27 + ? = 100
  37. 37.68 + ? = 100
  38. 38.69 + ? = 100
  39. 39.61 + ? = 100
  40. 40.20 + ? = 100

Answer key

  1. 3
  2. 14
  3. 70
  4. 41
  5. 8
  6. 35
  7. 27
  8. 22
  9. 54
  10. 63
  11. 61
  12. 11
  13. 7
  14. 78
  15. 5
  16. 37
  17. 2
  18. 33
  19. 9
  20. 29
  21. 89
  22. 76
  23. 67
  24. 6
  25. 20
  26. 4
  27. 66
  28. 34
  29. 57
  30. 15
  31. 42
  32. 78
  33. 24
  34. 36
  35. 86
  36. 73
  37. 32
  38. 31
  39. 39
  40. 80

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