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Number Bonds Worksheet (to 10 and 100)

Mental maths lesson 1: Number bonds to 10 and 100 · Set 708 · 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. 1.67 + ? = 100
  2. 2.1 + ? = 10
  3. 3.43 + ? = 100
  4. 4.12 + ? = 100
  5. 5.59 + ? = 100
  6. 6.2 + ? = 10
  7. 7.29 + ? = 100
  8. 8.8 + ? = 10
  9. 9.6 + ? = 10
  10. 10.15 + ? = 100
  11. 11.66 + ? = 100
  12. 12.56 + ? = 100
  13. 13.70 + ? = 100
  14. 14.4 + ? = 10
  15. 15.40 + ? = 100
  16. 16.5 + ? = 10
  17. 17.33 + ? = 100
  18. 18.49 + ? = 100
  19. 19.17 + ? = 100
  20. 20.47 + ? = 100
  21. 21.55 + ? = 100
  22. 22.3 + ? = 10
  23. 23.57 + ? = 100
  24. 24.31 + ? = 100
  25. 25.18 + ? = 100
  26. 26.35 + ? = 100
  27. 27.48 + ? = 100
  28. 28.7 + ? = 10
  29. 29.52 + ? = 100
  30. 30.9 + ? = 10
  31. 31.86 + ? = 100
  32. 32.45 + ? = 100
  33. 33.88 + ? = 100
  34. 34.83 + ? = 100
  35. 35.46 + ? = 100
  36. 36.77 + ? = 100
  37. 37.38 + ? = 100
  38. 38.79 + ? = 100
  39. 39.74 + ? = 100
  40. 40.63 + ? = 100

Answer key

  1. 33
  2. 9
  3. 57
  4. 88
  5. 41
  6. 8
  7. 71
  8. 2
  9. 4
  10. 85
  11. 34
  12. 44
  13. 30
  14. 6
  15. 60
  16. 5
  17. 67
  18. 51
  19. 83
  20. 53
  21. 45
  22. 7
  23. 43
  24. 69
  25. 82
  26. 65
  27. 52
  28. 3
  29. 48
  30. 1
  31. 14
  32. 55
  33. 12
  34. 17
  35. 54
  36. 23
  37. 62
  38. 21
  39. 26
  40. 37

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