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Number Bonds Worksheet (to 10 and 100)

Mental maths lesson 1: Number bonds to 10 and 100 · Set 344 · 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. 1.88 + ? = 100
  2. 2.6 + ? = 10
  3. 3.29 + ? = 100
  4. 4.9 + ? = 10
  5. 5.39 + ? = 100
  6. 6.82 + ? = 100
  7. 7.43 + ? = 100
  8. 8.5 + ? = 10
  9. 9.2 + ? = 10
  10. 10.66 + ? = 100
  11. 11.54 + ? = 100
  12. 12.12 + ? = 100
  13. 13.62 + ? = 100
  14. 14.58 + ? = 100
  15. 15.74 + ? = 100
  16. 16.22 + ? = 100
  17. 17.4 + ? = 10
  18. 18.3 + ? = 10
  19. 19.64 + ? = 100
  20. 20.41 + ? = 100
  21. 21.49 + ? = 100
  22. 22.7 + ? = 10
  23. 23.23 + ? = 100
  24. 24.8 + ? = 10
  25. 25.80 + ? = 100
  26. 26.52 + ? = 100
  27. 27.83 + ? = 100
  28. 28.67 + ? = 100
  29. 29.72 + ? = 100
  30. 30.24 + ? = 100
  31. 31.65 + ? = 100
  32. 32.44 + ? = 100
  33. 33.30 + ? = 100
  34. 34.51 + ? = 100
  35. 35.13 + ? = 100
  36. 36.31 + ? = 100
  37. 37.16 + ? = 100
  38. 38.1 + ? = 10
  39. 39.57 + ? = 100
  40. 40.84 + ? = 100

Answer key

  1. 12
  2. 4
  3. 71
  4. 1
  5. 61
  6. 18
  7. 57
  8. 5
  9. 8
  10. 34
  11. 46
  12. 88
  13. 38
  14. 42
  15. 26
  16. 78
  17. 6
  18. 7
  19. 36
  20. 59
  21. 51
  22. 3
  23. 77
  24. 2
  25. 20
  26. 48
  27. 17
  28. 33
  29. 28
  30. 76
  31. 35
  32. 56
  33. 70
  34. 49
  35. 87
  36. 69
  37. 84
  38. 9
  39. 43
  40. 16

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