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Number Bonds Worksheet (to 10 and 100)

Mental maths lesson 1: Number bonds to 10 and 100 · Set 622 · 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. 1.49 + ? = 100
  2. 2.2 + ? = 10
  3. 3.7 + ? = 10
  4. 4.27 + ? = 100
  5. 5.48 + ? = 100
  6. 6.3 + ? = 10
  7. 7.50 + ? = 100
  8. 8.5 + ? = 10
  9. 9.60 + ? = 100
  10. 10.89 + ? = 100
  11. 11.12 + ? = 100
  12. 12.63 + ? = 100
  13. 13.36 + ? = 100
  14. 14.6 + ? = 10
  15. 15.42 + ? = 100
  16. 16.19 + ? = 100
  17. 17.26 + ? = 100
  18. 18.59 + ? = 100
  19. 19.4 + ? = 10
  20. 20.28 + ? = 100
  21. 21.1 + ? = 10
  22. 22.54 + ? = 100
  23. 23.43 + ? = 100
  24. 24.68 + ? = 100
  25. 25.71 + ? = 100
  26. 26.30 + ? = 100
  27. 27.34 + ? = 100
  28. 28.17 + ? = 100
  29. 29.32 + ? = 100
  30. 30.62 + ? = 100
  31. 31.85 + ? = 100
  32. 32.20 + ? = 100
  33. 33.33 + ? = 100
  34. 34.29 + ? = 100
  35. 35.78 + ? = 100
  36. 36.56 + ? = 100
  37. 37.44 + ? = 100
  38. 38.14 + ? = 100
  39. 39.9 + ? = 10
  40. 40.72 + ? = 100

Answer key

  1. 51
  2. 8
  3. 3
  4. 73
  5. 52
  6. 7
  7. 50
  8. 5
  9. 40
  10. 11
  11. 88
  12. 37
  13. 64
  14. 4
  15. 58
  16. 81
  17. 74
  18. 41
  19. 6
  20. 72
  21. 9
  22. 46
  23. 57
  24. 32
  25. 29
  26. 70
  27. 66
  28. 83
  29. 68
  30. 38
  31. 15
  32. 80
  33. 67
  34. 71
  35. 22
  36. 44
  37. 56
  38. 86
  39. 1
  40. 28

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