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Number Bonds Worksheet (to 10 and 100)

Mental maths lesson 1: Number bonds to 10 and 100 · Set 373 · 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. 1.9 + ? = 10
  2. 2.52 + ? = 100
  3. 3.14 + ? = 100
  4. 4.82 + ? = 100
  5. 5.56 + ? = 100
  6. 6.22 + ? = 100
  7. 7.7 + ? = 10
  8. 8.31 + ? = 100
  9. 9.86 + ? = 100
  10. 10.8 + ? = 10
  11. 11.60 + ? = 100
  12. 12.1 + ? = 10
  13. 13.30 + ? = 100
  14. 14.74 + ? = 100
  15. 15.57 + ? = 100
  16. 16.43 + ? = 100
  17. 17.68 + ? = 100
  18. 18.33 + ? = 100
  19. 19.58 + ? = 100
  20. 20.84 + ? = 100
  21. 21.83 + ? = 100
  22. 22.21 + ? = 100
  23. 23.2 + ? = 10
  24. 24.3 + ? = 10
  25. 25.80 + ? = 100
  26. 26.47 + ? = 100
  27. 27.51 + ? = 100
  28. 28.53 + ? = 100
  29. 29.12 + ? = 100
  30. 30.19 + ? = 100
  31. 31.4 + ? = 10
  32. 32.26 + ? = 100
  33. 33.46 + ? = 100
  34. 34.89 + ? = 100
  35. 35.16 + ? = 100
  36. 36.66 + ? = 100
  37. 37.79 + ? = 100
  38. 38.5 + ? = 10
  39. 39.34 + ? = 100
  40. 40.77 + ? = 100

Answer key

  1. 1
  2. 48
  3. 86
  4. 18
  5. 44
  6. 78
  7. 3
  8. 69
  9. 14
  10. 2
  11. 40
  12. 9
  13. 70
  14. 26
  15. 43
  16. 57
  17. 32
  18. 67
  19. 42
  20. 16
  21. 17
  22. 79
  23. 8
  24. 7
  25. 20
  26. 53
  27. 49
  28. 47
  29. 88
  30. 81
  31. 6
  32. 74
  33. 54
  34. 11
  35. 84
  36. 34
  37. 21
  38. 5
  39. 66
  40. 23

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