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Number Bonds Worksheet (to 10 and 100)

Mental maths lesson 1: Number bonds to 10 and 100 · Set 579 · 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. 1.6 + ? = 10
  2. 2.1 + ? = 10
  3. 3.51 + ? = 100
  4. 4.9 + ? = 10
  5. 5.84 + ? = 100
  6. 6.28 + ? = 100
  7. 7.13 + ? = 100
  8. 8.19 + ? = 100
  9. 9.40 + ? = 100
  10. 10.58 + ? = 100
  11. 11.3 + ? = 10
  12. 12.7 + ? = 10
  13. 13.59 + ? = 100
  14. 14.31 + ? = 100
  15. 15.76 + ? = 100
  16. 16.4 + ? = 10
  17. 17.89 + ? = 100
  18. 18.54 + ? = 100
  19. 19.72 + ? = 100
  20. 20.8 + ? = 10
  21. 21.20 + ? = 100
  22. 22.15 + ? = 100
  23. 23.57 + ? = 100
  24. 24.49 + ? = 100
  25. 25.27 + ? = 100
  26. 26.36 + ? = 100
  27. 27.2 + ? = 10
  28. 28.53 + ? = 100
  29. 29.65 + ? = 100
  30. 30.33 + ? = 100
  31. 31.5 + ? = 10
  32. 32.64 + ? = 100
  33. 33.16 + ? = 100
  34. 34.79 + ? = 100
  35. 35.69 + ? = 100
  36. 36.12 + ? = 100
  37. 37.45 + ? = 100
  38. 38.32 + ? = 100
  39. 39.71 + ? = 100
  40. 40.70 + ? = 100

Answer key

  1. 4
  2. 9
  3. 49
  4. 1
  5. 16
  6. 72
  7. 87
  8. 81
  9. 60
  10. 42
  11. 7
  12. 3
  13. 41
  14. 69
  15. 24
  16. 6
  17. 11
  18. 46
  19. 28
  20. 2
  21. 80
  22. 85
  23. 43
  24. 51
  25. 73
  26. 64
  27. 8
  28. 47
  29. 35
  30. 67
  31. 5
  32. 36
  33. 84
  34. 21
  35. 31
  36. 88
  37. 55
  38. 68
  39. 29
  40. 30

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