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Number Bonds Worksheet (to 10 and 100)

Mental maths lesson 1: Number bonds to 10 and 100 · Set 292 · 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. 1.47 + ? = 100
  2. 2.16 + ? = 100
  3. 3.5 + ? = 10
  4. 4.3 + ? = 10
  5. 5.89 + ? = 100
  6. 6.74 + ? = 100
  7. 7.6 + ? = 10
  8. 8.44 + ? = 100
  9. 9.2 + ? = 10
  10. 10.1 + ? = 10
  11. 11.45 + ? = 100
  12. 12.7 + ? = 10
  13. 13.21 + ? = 100
  14. 14.26 + ? = 100
  15. 15.37 + ? = 100
  16. 16.43 + ? = 100
  17. 17.8 + ? = 10
  18. 18.79 + ? = 100
  19. 19.9 + ? = 10
  20. 20.53 + ? = 100
  21. 21.85 + ? = 100
  22. 22.75 + ? = 100
  23. 23.25 + ? = 100
  24. 24.4 + ? = 10
  25. 25.22 + ? = 100
  26. 26.63 + ? = 100
  27. 27.49 + ? = 100
  28. 28.78 + ? = 100
  29. 29.50 + ? = 100
  30. 30.12 + ? = 100
  31. 31.13 + ? = 100
  32. 32.33 + ? = 100
  33. 33.41 + ? = 100
  34. 34.67 + ? = 100
  35. 35.64 + ? = 100
  36. 36.29 + ? = 100
  37. 37.58 + ? = 100
  38. 38.86 + ? = 100
  39. 39.52 + ? = 100
  40. 40.66 + ? = 100

Answer key

  1. 53
  2. 84
  3. 5
  4. 7
  5. 11
  6. 26
  7. 4
  8. 56
  9. 8
  10. 9
  11. 55
  12. 3
  13. 79
  14. 74
  15. 63
  16. 57
  17. 2
  18. 21
  19. 1
  20. 47
  21. 15
  22. 25
  23. 75
  24. 6
  25. 78
  26. 37
  27. 51
  28. 22
  29. 50
  30. 88
  31. 87
  32. 67
  33. 59
  34. 33
  35. 36
  36. 71
  37. 42
  38. 14
  39. 48
  40. 34

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