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Number Bonds Worksheet (to 10 and 100)

Mental maths lesson 1: Number bonds to 10 and 100 · Set 328 · 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. 1.26 + ? = 100
  2. 2.1 + ? = 10
  3. 3.51 + ? = 100
  4. 4.4 + ? = 10
  5. 5.63 + ? = 100
  6. 6.76 + ? = 100
  7. 7.47 + ? = 100
  8. 8.30 + ? = 100
  9. 9.41 + ? = 100
  10. 10.9 + ? = 10
  11. 11.6 + ? = 10
  12. 12.5 + ? = 10
  13. 13.3 + ? = 10
  14. 14.69 + ? = 100
  15. 15.85 + ? = 100
  16. 16.7 + ? = 10
  17. 17.2 + ? = 10
  18. 18.44 + ? = 100
  19. 19.8 + ? = 10
  20. 20.58 + ? = 100
  21. 21.82 + ? = 100
  22. 22.25 + ? = 100
  23. 23.28 + ? = 100
  24. 24.11 + ? = 100
  25. 25.72 + ? = 100
  26. 26.43 + ? = 100
  27. 27.14 + ? = 100
  28. 28.18 + ? = 100
  29. 29.13 + ? = 100
  30. 30.71 + ? = 100
  31. 31.66 + ? = 100
  32. 32.46 + ? = 100
  33. 33.22 + ? = 100
  34. 34.78 + ? = 100
  35. 35.81 + ? = 100
  36. 36.45 + ? = 100
  37. 37.80 + ? = 100
  38. 38.21 + ? = 100
  39. 39.36 + ? = 100
  40. 40.19 + ? = 100

Answer key

  1. 74
  2. 9
  3. 49
  4. 6
  5. 37
  6. 24
  7. 53
  8. 70
  9. 59
  10. 1
  11. 4
  12. 5
  13. 7
  14. 31
  15. 15
  16. 3
  17. 8
  18. 56
  19. 2
  20. 42
  21. 18
  22. 75
  23. 72
  24. 89
  25. 28
  26. 57
  27. 86
  28. 82
  29. 87
  30. 29
  31. 34
  32. 54
  33. 78
  34. 22
  35. 19
  36. 55
  37. 20
  38. 79
  39. 64
  40. 81

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