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Number Bonds Worksheet (to 10 and 100)

Mental maths lesson 1: Number bonds to 10 and 100 · Set 301 · 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. 1.70 + ? = 100
  2. 2.33 + ? = 100
  3. 3.16 + ? = 100
  4. 4.51 + ? = 100
  5. 5.4 + ? = 10
  6. 6.6 + ? = 10
  7. 7.2 + ? = 10
  8. 8.7 + ? = 10
  9. 9.5 + ? = 10
  10. 10.88 + ? = 100
  11. 11.3 + ? = 10
  12. 12.64 + ? = 100
  13. 13.53 + ? = 100
  14. 14.55 + ? = 100
  15. 15.38 + ? = 100
  16. 16.25 + ? = 100
  17. 17.59 + ? = 100
  18. 18.31 + ? = 100
  19. 19.1 + ? = 10
  20. 20.60 + ? = 100
  21. 21.8 + ? = 10
  22. 22.50 + ? = 100
  23. 23.14 + ? = 100
  24. 24.89 + ? = 100
  25. 25.9 + ? = 10
  26. 26.72 + ? = 100
  27. 27.29 + ? = 100
  28. 28.73 + ? = 100
  29. 29.21 + ? = 100
  30. 30.71 + ? = 100
  31. 31.63 + ? = 100
  32. 32.30 + ? = 100
  33. 33.74 + ? = 100
  34. 34.15 + ? = 100
  35. 35.28 + ? = 100
  36. 36.81 + ? = 100
  37. 37.34 + ? = 100
  38. 38.69 + ? = 100
  39. 39.83 + ? = 100
  40. 40.76 + ? = 100

Answer key

  1. 30
  2. 67
  3. 84
  4. 49
  5. 6
  6. 4
  7. 8
  8. 3
  9. 5
  10. 12
  11. 7
  12. 36
  13. 47
  14. 45
  15. 62
  16. 75
  17. 41
  18. 69
  19. 9
  20. 40
  21. 2
  22. 50
  23. 86
  24. 11
  25. 1
  26. 28
  27. 71
  28. 27
  29. 79
  30. 29
  31. 37
  32. 70
  33. 26
  34. 85
  35. 72
  36. 19
  37. 66
  38. 31
  39. 17
  40. 24

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