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Number Bonds Worksheet (to 10 and 100)

Mental maths lesson 1: Number bonds to 10 and 100 · Set 337 · 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. 2.1 + ? = 10
  3. 3.87 + ? = 100
  4. 4.41 + ? = 100
  5. 5.9 + ? = 10
  6. 6.69 + ? = 100
  7. 7.84 + ? = 100
  8. 8.12 + ? = 100
  9. 9.23 + ? = 100
  10. 10.32 + ? = 100
  11. 11.68 + ? = 100
  12. 12.48 + ? = 100
  13. 13.30 + ? = 100
  14. 14.22 + ? = 100
  15. 15.2 + ? = 10
  16. 16.39 + ? = 100
  17. 17.6 + ? = 10
  18. 18.16 + ? = 100
  19. 19.3 + ? = 10
  20. 20.21 + ? = 100
  21. 21.8 + ? = 10
  22. 22.19 + ? = 100
  23. 23.40 + ? = 100
  24. 24.57 + ? = 100
  25. 25.51 + ? = 100
  26. 26.60 + ? = 100
  27. 27.5 + ? = 10
  28. 28.17 + ? = 100
  29. 29.28 + ? = 100
  30. 30.86 + ? = 100
  31. 31.76 + ? = 100
  32. 32.56 + ? = 100
  33. 33.46 + ? = 100
  34. 34.7 + ? = 10
  35. 35.55 + ? = 100
  36. 36.26 + ? = 100
  37. 37.47 + ? = 100
  38. 38.74 + ? = 100
  39. 39.75 + ? = 100
  40. 40.83 + ? = 100

Answer key

  1. 6
  2. 9
  3. 13
  4. 59
  5. 1
  6. 31
  7. 16
  8. 88
  9. 77
  10. 68
  11. 32
  12. 52
  13. 70
  14. 78
  15. 8
  16. 61
  17. 4
  18. 84
  19. 7
  20. 79
  21. 2
  22. 81
  23. 60
  24. 43
  25. 49
  26. 40
  27. 5
  28. 83
  29. 72
  30. 14
  31. 24
  32. 44
  33. 54
  34. 3
  35. 45
  36. 74
  37. 53
  38. 26
  39. 25
  40. 17

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