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Number Bonds Worksheet (to 10 and 100)

Mental maths lesson 1: Number bonds to 10 and 100 · Set 692 · 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. 1.19 + ? = 100
  2. 2.23 + ? = 100
  3. 3.20 + ? = 100
  4. 4.51 + ? = 100
  5. 5.1 + ? = 10
  6. 6.4 + ? = 10
  7. 7.7 + ? = 10
  8. 8.45 + ? = 100
  9. 9.13 + ? = 100
  10. 10.2 + ? = 10
  11. 11.6 + ? = 10
  12. 12.9 + ? = 10
  13. 13.85 + ? = 100
  14. 14.62 + ? = 100
  15. 15.3 + ? = 10
  16. 16.78 + ? = 100
  17. 17.8 + ? = 10
  18. 18.34 + ? = 100
  19. 19.66 + ? = 100
  20. 20.50 + ? = 100
  21. 21.28 + ? = 100
  22. 22.53 + ? = 100
  23. 23.33 + ? = 100
  24. 24.5 + ? = 10
  25. 25.14 + ? = 100
  26. 26.44 + ? = 100
  27. 27.47 + ? = 100
  28. 28.11 + ? = 100
  29. 29.70 + ? = 100
  30. 30.43 + ? = 100
  31. 31.60 + ? = 100
  32. 32.26 + ? = 100
  33. 33.57 + ? = 100
  34. 34.56 + ? = 100
  35. 35.41 + ? = 100
  36. 36.84 + ? = 100
  37. 37.29 + ? = 100
  38. 38.67 + ? = 100
  39. 39.54 + ? = 100
  40. 40.35 + ? = 100

Answer key

  1. 81
  2. 77
  3. 80
  4. 49
  5. 9
  6. 6
  7. 3
  8. 55
  9. 87
  10. 8
  11. 4
  12. 1
  13. 15
  14. 38
  15. 7
  16. 22
  17. 2
  18. 66
  19. 34
  20. 50
  21. 72
  22. 47
  23. 67
  24. 5
  25. 86
  26. 56
  27. 53
  28. 89
  29. 30
  30. 57
  31. 40
  32. 74
  33. 43
  34. 44
  35. 59
  36. 16
  37. 71
  38. 33
  39. 46
  40. 65

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