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Number Bonds Worksheet (to 10 and 100)

Mental maths lesson 1: Number bonds to 10 and 100 · Set 306 · 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. 1.69 + ? = 100
  2. 2.3 + ? = 10
  3. 3.71 + ? = 100
  4. 4.27 + ? = 100
  5. 5.46 + ? = 100
  6. 6.57 + ? = 100
  7. 7.12 + ? = 100
  8. 8.8 + ? = 10
  9. 9.1 + ? = 10
  10. 10.9 + ? = 10
  11. 11.5 + ? = 10
  12. 12.2 + ? = 10
  13. 13.70 + ? = 100
  14. 14.7 + ? = 10
  15. 15.33 + ? = 100
  16. 16.16 + ? = 100
  17. 17.19 + ? = 100
  18. 18.21 + ? = 100
  19. 19.29 + ? = 100
  20. 20.78 + ? = 100
  21. 21.42 + ? = 100
  22. 22.89 + ? = 100
  23. 23.88 + ? = 100
  24. 24.4 + ? = 10
  25. 25.18 + ? = 100
  26. 26.36 + ? = 100
  27. 27.23 + ? = 100
  28. 28.40 + ? = 100
  29. 29.68 + ? = 100
  30. 30.48 + ? = 100
  31. 31.37 + ? = 100
  32. 32.47 + ? = 100
  33. 33.62 + ? = 100
  34. 34.84 + ? = 100
  35. 35.77 + ? = 100
  36. 36.61 + ? = 100
  37. 37.11 + ? = 100
  38. 38.45 + ? = 100
  39. 39.6 + ? = 10
  40. 40.63 + ? = 100

Answer key

  1. 31
  2. 7
  3. 29
  4. 73
  5. 54
  6. 43
  7. 88
  8. 2
  9. 9
  10. 1
  11. 5
  12. 8
  13. 30
  14. 3
  15. 67
  16. 84
  17. 81
  18. 79
  19. 71
  20. 22
  21. 58
  22. 11
  23. 12
  24. 6
  25. 82
  26. 64
  27. 77
  28. 60
  29. 32
  30. 52
  31. 63
  32. 53
  33. 38
  34. 16
  35. 23
  36. 39
  37. 89
  38. 55
  39. 4
  40. 37

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