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Number Bonds Worksheet (to 10 and 100)

Mental maths lesson 1: Number bonds to 10 and 100 · Set 53 · 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. 1.3 + ? = 10
  2. 2.53 + ? = 100
  3. 3.63 + ? = 100
  4. 4.2 + ? = 10
  5. 5.21 + ? = 100
  6. 6.9 + ? = 10
  7. 7.64 + ? = 100
  8. 8.34 + ? = 100
  9. 9.18 + ? = 100
  10. 10.48 + ? = 100
  11. 11.57 + ? = 100
  12. 12.6 + ? = 10
  13. 13.1 + ? = 10
  14. 14.8 + ? = 10
  15. 15.17 + ? = 100
  16. 16.7 + ? = 10
  17. 17.74 + ? = 100
  18. 18.16 + ? = 100
  19. 19.30 + ? = 100
  20. 20.89 + ? = 100
  21. 21.73 + ? = 100
  22. 22.67 + ? = 100
  23. 23.5 + ? = 10
  24. 24.52 + ? = 100
  25. 25.62 + ? = 100
  26. 26.82 + ? = 100
  27. 27.27 + ? = 100
  28. 28.80 + ? = 100
  29. 29.26 + ? = 100
  30. 30.33 + ? = 100
  31. 31.44 + ? = 100
  32. 32.54 + ? = 100
  33. 33.4 + ? = 10
  34. 34.72 + ? = 100
  35. 35.11 + ? = 100
  36. 36.23 + ? = 100
  37. 37.24 + ? = 100
  38. 38.32 + ? = 100
  39. 39.14 + ? = 100
  40. 40.71 + ? = 100

Answer key

  1. 7
  2. 47
  3. 37
  4. 8
  5. 79
  6. 1
  7. 36
  8. 66
  9. 82
  10. 52
  11. 43
  12. 4
  13. 9
  14. 2
  15. 83
  16. 3
  17. 26
  18. 84
  19. 70
  20. 11
  21. 27
  22. 33
  23. 5
  24. 48
  25. 38
  26. 18
  27. 73
  28. 20
  29. 74
  30. 67
  31. 56
  32. 46
  33. 6
  34. 28
  35. 89
  36. 77
  37. 76
  38. 68
  39. 86
  40. 29

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