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Number Bonds Worksheet (to 10 and 100)

Mental maths lesson 1: Number bonds to 10 and 100 · Set 112 · 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. 1.2 + ? = 10
  2. 2.47 + ? = 100
  3. 3.1 + ? = 10
  4. 4.4 + ? = 10
  5. 5.7 + ? = 10
  6. 6.6 + ? = 10
  7. 7.53 + ? = 100
  8. 8.9 + ? = 10
  9. 9.60 + ? = 100
  10. 10.75 + ? = 100
  11. 11.77 + ? = 100
  12. 12.22 + ? = 100
  13. 13.49 + ? = 100
  14. 14.23 + ? = 100
  15. 15.54 + ? = 100
  16. 16.80 + ? = 100
  17. 17.3 + ? = 10
  18. 18.8 + ? = 10
  19. 19.45 + ? = 100
  20. 20.51 + ? = 100
  21. 21.5 + ? = 10
  22. 22.34 + ? = 100
  23. 23.32 + ? = 100
  24. 24.48 + ? = 100
  25. 25.67 + ? = 100
  26. 26.29 + ? = 100
  27. 27.26 + ? = 100
  28. 28.71 + ? = 100
  29. 29.36 + ? = 100
  30. 30.9 + ? = 10
  31. 31.16 + ? = 100
  32. 32.28 + ? = 100
  33. 33.70 + ? = 100
  34. 34.66 + ? = 100
  35. 35.11 + ? = 100
  36. 36.65 + ? = 100
  37. 37.82 + ? = 100
  38. 38.40 + ? = 100
  39. 39.84 + ? = 100
  40. 40.38 + ? = 100

Answer key

  1. 8
  2. 53
  3. 9
  4. 6
  5. 3
  6. 4
  7. 47
  8. 1
  9. 40
  10. 25
  11. 23
  12. 78
  13. 51
  14. 77
  15. 46
  16. 20
  17. 7
  18. 2
  19. 55
  20. 49
  21. 5
  22. 66
  23. 68
  24. 52
  25. 33
  26. 71
  27. 74
  28. 29
  29. 64
  30. 1
  31. 84
  32. 72
  33. 30
  34. 34
  35. 89
  36. 35
  37. 18
  38. 60
  39. 16
  40. 62

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