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Number Bonds Worksheet (to 10 and 100)

Mental maths lesson 1: Number bonds to 10 and 100 · Set 320 · 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. 1.4 + ? = 10
  2. 2.17 + ? = 100
  3. 3.8 + ? = 10
  4. 4.5 + ? = 10
  5. 5.18 + ? = 100
  6. 6.1 + ? = 10
  7. 7.9 + ? = 10
  8. 8.67 + ? = 100
  9. 9.46 + ? = 100
  10. 10.27 + ? = 100
  11. 11.7 + ? = 10
  12. 12.47 + ? = 100
  13. 13.66 + ? = 100
  14. 14.63 + ? = 100
  15. 15.55 + ? = 100
  16. 16.19 + ? = 100
  17. 17.24 + ? = 100
  18. 18.69 + ? = 100
  19. 19.3 + ? = 10
  20. 20.21 + ? = 100
  21. 21.37 + ? = 100
  22. 22.25 + ? = 100
  23. 23.56 + ? = 100
  24. 24.2 + ? = 10
  25. 25.74 + ? = 100
  26. 26.81 + ? = 100
  27. 27.6 + ? = 10
  28. 28.13 + ? = 100
  29. 29.53 + ? = 100
  30. 30.52 + ? = 100
  31. 31.29 + ? = 100
  32. 32.58 + ? = 100
  33. 33.31 + ? = 100
  34. 34.33 + ? = 100
  35. 35.68 + ? = 100
  36. 36.36 + ? = 100
  37. 37.49 + ? = 100
  38. 38.77 + ? = 100
  39. 39.15 + ? = 100
  40. 40.71 + ? = 100

Answer key

  1. 6
  2. 83
  3. 2
  4. 5
  5. 82
  6. 9
  7. 1
  8. 33
  9. 54
  10. 73
  11. 3
  12. 53
  13. 34
  14. 37
  15. 45
  16. 81
  17. 76
  18. 31
  19. 7
  20. 79
  21. 63
  22. 75
  23. 44
  24. 8
  25. 26
  26. 19
  27. 4
  28. 87
  29. 47
  30. 48
  31. 71
  32. 42
  33. 69
  34. 67
  35. 32
  36. 64
  37. 51
  38. 23
  39. 85
  40. 29

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