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Number Bonds Worksheet (to 10 and 100)

Mental maths lesson 1: Number bonds to 10 and 100 · Set 555 · 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. 1.6 + ? = 10
  2. 2.33 + ? = 100
  3. 3.5 + ? = 10
  4. 4.69 + ? = 100
  5. 5.32 + ? = 100
  6. 6.2 + ? = 10
  7. 7.30 + ? = 100
  8. 8.7 + ? = 10
  9. 9.9 + ? = 10
  10. 10.44 + ? = 100
  11. 11.63 + ? = 100
  12. 12.8 + ? = 10
  13. 13.4 + ? = 10
  14. 14.38 + ? = 100
  15. 15.62 + ? = 100
  16. 16.88 + ? = 100
  17. 17.25 + ? = 100
  18. 18.57 + ? = 100
  19. 19.31 + ? = 100
  20. 20.47 + ? = 100
  21. 21.45 + ? = 100
  22. 22.22 + ? = 100
  23. 23.81 + ? = 100
  24. 24.1 + ? = 10
  25. 25.27 + ? = 100
  26. 26.83 + ? = 100
  27. 27.3 + ? = 10
  28. 28.55 + ? = 100
  29. 29.58 + ? = 100
  30. 30.16 + ? = 100
  31. 31.43 + ? = 100
  32. 32.42 + ? = 100
  33. 33.51 + ? = 100
  34. 34.37 + ? = 100
  35. 35.54 + ? = 100
  36. 36.66 + ? = 100
  37. 37.76 + ? = 100
  38. 38.26 + ? = 100
  39. 39.49 + ? = 100
  40. 40.60 + ? = 100

Answer key

  1. 4
  2. 67
  3. 5
  4. 31
  5. 68
  6. 8
  7. 70
  8. 3
  9. 1
  10. 56
  11. 37
  12. 2
  13. 6
  14. 62
  15. 38
  16. 12
  17. 75
  18. 43
  19. 69
  20. 53
  21. 55
  22. 78
  23. 19
  24. 9
  25. 73
  26. 17
  27. 7
  28. 45
  29. 42
  30. 84
  31. 57
  32. 58
  33. 49
  34. 63
  35. 46
  36. 34
  37. 24
  38. 74
  39. 51
  40. 40

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