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Number Bonds Worksheet (to 10 and 100)

Mental maths lesson 1: Number bonds to 10 and 100 · Set 557 · 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. 2.31 + ? = 100
  3. 3.2 + ? = 10
  4. 4.14 + ? = 100
  5. 5.29 + ? = 100
  6. 6.4 + ? = 10
  7. 7.8 + ? = 10
  8. 8.1 + ? = 10
  9. 9.3 + ? = 10
  10. 10.27 + ? = 100
  11. 11.15 + ? = 100
  12. 12.46 + ? = 100
  13. 13.23 + ? = 100
  14. 14.43 + ? = 100
  15. 15.9 + ? = 10
  16. 16.77 + ? = 100
  17. 17.13 + ? = 100
  18. 18.63 + ? = 100
  19. 19.40 + ? = 100
  20. 20.78 + ? = 100
  21. 21.12 + ? = 100
  22. 22.75 + ? = 100
  23. 23.53 + ? = 100
  24. 24.52 + ? = 100
  25. 25.38 + ? = 100
  26. 26.17 + ? = 100
  27. 27.44 + ? = 100
  28. 28.5 + ? = 10
  29. 29.45 + ? = 100
  30. 30.62 + ? = 100
  31. 31.87 + ? = 100
  32. 32.61 + ? = 100
  33. 33.85 + ? = 100
  34. 34.18 + ? = 100
  35. 35.81 + ? = 100
  36. 36.24 + ? = 100
  37. 37.66 + ? = 100
  38. 38.72 + ? = 100
  39. 39.76 + ? = 100
  40. 40.58 + ? = 100

Answer key

  1. 3
  2. 69
  3. 8
  4. 86
  5. 71
  6. 6
  7. 2
  8. 9
  9. 7
  10. 73
  11. 85
  12. 54
  13. 77
  14. 57
  15. 1
  16. 23
  17. 87
  18. 37
  19. 60
  20. 22
  21. 88
  22. 25
  23. 47
  24. 48
  25. 62
  26. 83
  27. 56
  28. 5
  29. 55
  30. 38
  31. 13
  32. 39
  33. 15
  34. 82
  35. 19
  36. 76
  37. 34
  38. 28
  39. 24
  40. 42

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