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Number Bonds Worksheet (to 10 and 100)

Mental maths lesson 1: Number bonds to 10 and 100 · Set 698 · 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. 1.3 + ? = 10
  2. 2.47 + ? = 100
  3. 3.59 + ? = 100
  4. 4.1 + ? = 10
  5. 5.7 + ? = 10
  6. 6.5 + ? = 10
  7. 7.8 + ? = 10
  8. 8.82 + ? = 100
  9. 9.39 + ? = 100
  10. 10.63 + ? = 100
  11. 11.74 + ? = 100
  12. 12.65 + ? = 100
  13. 13.24 + ? = 100
  14. 14.57 + ? = 100
  15. 15.17 + ? = 100
  16. 16.20 + ? = 100
  17. 17.6 + ? = 10
  18. 18.43 + ? = 100
  19. 19.45 + ? = 100
  20. 20.56 + ? = 100
  21. 21.61 + ? = 100
  22. 22.46 + ? = 100
  23. 23.16 + ? = 100
  24. 24.51 + ? = 100
  25. 25.9 + ? = 10
  26. 26.60 + ? = 100
  27. 27.28 + ? = 100
  28. 28.55 + ? = 100
  29. 29.88 + ? = 100
  30. 30.68 + ? = 100
  31. 31.11 + ? = 100
  32. 32.4 + ? = 10
  33. 33.2 + ? = 10
  34. 34.70 + ? = 100
  35. 35.35 + ? = 100
  36. 36.15 + ? = 100
  37. 37.67 + ? = 100
  38. 38.44 + ? = 100
  39. 39.77 + ? = 100
  40. 40.52 + ? = 100

Answer key

  1. 7
  2. 53
  3. 41
  4. 9
  5. 3
  6. 5
  7. 2
  8. 18
  9. 61
  10. 37
  11. 26
  12. 35
  13. 76
  14. 43
  15. 83
  16. 80
  17. 4
  18. 57
  19. 55
  20. 44
  21. 39
  22. 54
  23. 84
  24. 49
  25. 1
  26. 40
  27. 72
  28. 45
  29. 12
  30. 32
  31. 89
  32. 6
  33. 8
  34. 30
  35. 65
  36. 85
  37. 33
  38. 56
  39. 23
  40. 48

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