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Number Bonds Worksheet (to 10 and 100)

Mental maths lesson 1: Number bonds to 10 and 100 · Set 468 · 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. 1.3 + ? = 10
  2. 2.26 + ? = 100
  3. 3.15 + ? = 100
  4. 4.44 + ? = 100
  5. 5.21 + ? = 100
  6. 6.9 + ? = 10
  7. 7.4 + ? = 10
  8. 8.71 + ? = 100
  9. 9.7 + ? = 10
  10. 10.50 + ? = 100
  11. 11.74 + ? = 100
  12. 12.22 + ? = 100
  13. 13.54 + ? = 100
  14. 14.6 + ? = 10
  15. 15.8 + ? = 10
  16. 16.52 + ? = 100
  17. 17.70 + ? = 100
  18. 18.68 + ? = 100
  19. 19.65 + ? = 100
  20. 20.41 + ? = 100
  21. 21.73 + ? = 100
  22. 22.25 + ? = 100
  23. 23.84 + ? = 100
  24. 24.1 + ? = 10
  25. 25.13 + ? = 100
  26. 26.83 + ? = 100
  27. 27.88 + ? = 100
  28. 28.76 + ? = 100
  29. 29.49 + ? = 100
  30. 30.46 + ? = 100
  31. 31.75 + ? = 100
  32. 32.42 + ? = 100
  33. 33.38 + ? = 100
  34. 34.2 + ? = 10
  35. 35.5 + ? = 10
  36. 36.34 + ? = 100
  37. 37.53 + ? = 100
  38. 38.61 + ? = 100
  39. 39.29 + ? = 100
  40. 40.19 + ? = 100

Answer key

  1. 7
  2. 74
  3. 85
  4. 56
  5. 79
  6. 1
  7. 6
  8. 29
  9. 3
  10. 50
  11. 26
  12. 78
  13. 46
  14. 4
  15. 2
  16. 48
  17. 30
  18. 32
  19. 35
  20. 59
  21. 27
  22. 75
  23. 16
  24. 9
  25. 87
  26. 17
  27. 12
  28. 24
  29. 51
  30. 54
  31. 25
  32. 58
  33. 62
  34. 8
  35. 5
  36. 66
  37. 47
  38. 39
  39. 71
  40. 81

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