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Number Bonds Worksheet (to 10 and 100)

Mental maths lesson 1: Number bonds to 10 and 100 · Set 186 · 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. 3.8 + ? = 10
  4. 4.15 + ? = 100
  5. 5.4 + ? = 10
  6. 6.58 + ? = 100
  7. 7.1 + ? = 10
  8. 8.6 + ? = 10
  9. 9.72 + ? = 100
  10. 10.62 + ? = 100
  11. 11.22 + ? = 100
  12. 12.27 + ? = 100
  13. 13.74 + ? = 100
  14. 14.50 + ? = 100
  15. 15.42 + ? = 100
  16. 16.17 + ? = 100
  17. 17.31 + ? = 100
  18. 18.2 + ? = 10
  19. 19.41 + ? = 100
  20. 20.36 + ? = 100
  21. 21.29 + ? = 100
  22. 22.49 + ? = 100
  23. 23.18 + ? = 100
  24. 24.88 + ? = 100
  25. 25.9 + ? = 10
  26. 26.34 + ? = 100
  27. 27.60 + ? = 100
  28. 28.32 + ? = 100
  29. 29.19 + ? = 100
  30. 30.80 + ? = 100
  31. 31.33 + ? = 100
  32. 32.67 + ? = 100
  33. 33.14 + ? = 100
  34. 34.5 + ? = 10
  35. 35.7 + ? = 10
  36. 36.78 + ? = 100
  37. 37.86 + ? = 100
  38. 38.26 + ? = 100
  39. 39.3 + ? = 10
  40. 40.11 + ? = 100

Answer key

  1. 53
  2. 84
  3. 2
  4. 85
  5. 6
  6. 42
  7. 9
  8. 4
  9. 28
  10. 38
  11. 78
  12. 73
  13. 26
  14. 50
  15. 58
  16. 83
  17. 69
  18. 8
  19. 59
  20. 64
  21. 71
  22. 51
  23. 82
  24. 12
  25. 1
  26. 66
  27. 40
  28. 68
  29. 81
  30. 20
  31. 67
  32. 33
  33. 86
  34. 5
  35. 3
  36. 22
  37. 14
  38. 74
  39. 7
  40. 89

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