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Number Bonds Worksheet (to 10 and 100)

Mental maths lesson 1: Number bonds to 10 and 100 · Set 303 · 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. 1.4 + ? = 10
  2. 2.1 + ? = 10
  3. 3.5 + ? = 10
  4. 4.32 + ? = 100
  5. 5.7 + ? = 10
  6. 6.23 + ? = 100
  7. 7.14 + ? = 100
  8. 8.26 + ? = 100
  9. 9.38 + ? = 100
  10. 10.12 + ? = 100
  11. 11.8 + ? = 10
  12. 12.22 + ? = 100
  13. 13.71 + ? = 100
  14. 14.18 + ? = 100
  15. 15.3 + ? = 10
  16. 16.11 + ? = 100
  17. 17.16 + ? = 100
  18. 18.20 + ? = 100
  19. 19.87 + ? = 100
  20. 20.28 + ? = 100
  21. 21.2 + ? = 10
  22. 22.73 + ? = 100
  23. 23.6 + ? = 10
  24. 24.9 + ? = 10
  25. 25.58 + ? = 100
  26. 26.63 + ? = 100
  27. 27.31 + ? = 100
  28. 28.34 + ? = 100
  29. 29.67 + ? = 100
  30. 30.47 + ? = 100
  31. 31.20 + ? = 100
  32. 32.83 + ? = 100
  33. 33.39 + ? = 100
  34. 34.89 + ? = 100
  35. 35.76 + ? = 100
  36. 36.37 + ? = 100
  37. 37.50 + ? = 100
  38. 38.75 + ? = 100
  39. 39.49 + ? = 100
  40. 40.41 + ? = 100

Answer key

  1. 6
  2. 9
  3. 5
  4. 68
  5. 3
  6. 77
  7. 86
  8. 74
  9. 62
  10. 88
  11. 2
  12. 78
  13. 29
  14. 82
  15. 7
  16. 89
  17. 84
  18. 80
  19. 13
  20. 72
  21. 8
  22. 27
  23. 4
  24. 1
  25. 42
  26. 37
  27. 69
  28. 66
  29. 33
  30. 53
  31. 80
  32. 17
  33. 61
  34. 11
  35. 24
  36. 63
  37. 50
  38. 25
  39. 51
  40. 59

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