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Number Bonds Worksheet (to 10 and 100)

Mental maths lesson 1: Number bonds to 10 and 100 · Set 282 · 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. 1.8 + ? = 10
  2. 2.73 + ? = 100
  3. 3.82 + ? = 100
  4. 4.76 + ? = 100
  5. 5.5 + ? = 10
  6. 6.40 + ? = 100
  7. 7.1 + ? = 10
  8. 8.51 + ? = 100
  9. 9.62 + ? = 100
  10. 10.22 + ? = 100
  11. 11.25 + ? = 100
  12. 12.19 + ? = 100
  13. 13.3 + ? = 10
  14. 14.20 + ? = 100
  15. 15.64 + ? = 100
  16. 16.4 + ? = 10
  17. 17.65 + ? = 100
  18. 18.17 + ? = 100
  19. 19.67 + ? = 100
  20. 20.6 + ? = 10
  21. 21.44 + ? = 100
  22. 22.26 + ? = 100
  23. 23.81 + ? = 100
  24. 24.2 + ? = 10
  25. 25.75 + ? = 100
  26. 26.11 + ? = 100
  27. 27.34 + ? = 100
  28. 28.33 + ? = 100
  29. 29.30 + ? = 100
  30. 30.21 + ? = 100
  31. 31.7 + ? = 10
  32. 32.85 + ? = 100
  33. 33.29 + ? = 100
  34. 34.57 + ? = 100
  35. 35.9 + ? = 10
  36. 36.70 + ? = 100
  37. 37.35 + ? = 100
  38. 38.68 + ? = 100
  39. 39.66 + ? = 100
  40. 40.39 + ? = 100

Answer key

  1. 2
  2. 27
  3. 18
  4. 24
  5. 5
  6. 60
  7. 9
  8. 49
  9. 38
  10. 78
  11. 75
  12. 81
  13. 7
  14. 80
  15. 36
  16. 6
  17. 35
  18. 83
  19. 33
  20. 4
  21. 56
  22. 74
  23. 19
  24. 8
  25. 25
  26. 89
  27. 66
  28. 67
  29. 70
  30. 79
  31. 3
  32. 15
  33. 71
  34. 43
  35. 1
  36. 30
  37. 65
  38. 32
  39. 34
  40. 61

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