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Number Bonds Worksheet (to 10 and 100)

Mental maths lesson 1: Number bonds to 10 and 100 · Set 194 · 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. 1.76 + ? = 100
  2. 2.6 + ? = 10
  3. 3.26 + ? = 100
  4. 4.23 + ? = 100
  5. 5.62 + ? = 100
  6. 6.1 + ? = 10
  7. 7.9 + ? = 10
  8. 8.79 + ? = 100
  9. 9.72 + ? = 100
  10. 10.2 + ? = 10
  11. 11.14 + ? = 100
  12. 12.37 + ? = 100
  13. 13.49 + ? = 100
  14. 14.4 + ? = 10
  15. 15.39 + ? = 100
  16. 16.70 + ? = 100
  17. 17.42 + ? = 100
  18. 18.77 + ? = 100
  19. 19.84 + ? = 100
  20. 20.53 + ? = 100
  21. 21.8 + ? = 10
  22. 22.73 + ? = 100
  23. 23.24 + ? = 100
  24. 24.28 + ? = 100
  25. 25.3 + ? = 10
  26. 26.44 + ? = 100
  27. 27.58 + ? = 100
  28. 28.83 + ? = 100
  29. 29.78 + ? = 100
  30. 30.38 + ? = 100
  31. 31.45 + ? = 100
  32. 32.7 + ? = 10
  33. 33.21 + ? = 100
  34. 34.33 + ? = 100
  35. 35.67 + ? = 100
  36. 36.5 + ? = 10
  37. 37.46 + ? = 100
  38. 38.47 + ? = 100
  39. 39.86 + ? = 100
  40. 40.69 + ? = 100

Answer key

  1. 24
  2. 4
  3. 74
  4. 77
  5. 38
  6. 9
  7. 1
  8. 21
  9. 28
  10. 8
  11. 86
  12. 63
  13. 51
  14. 6
  15. 61
  16. 30
  17. 58
  18. 23
  19. 16
  20. 47
  21. 2
  22. 27
  23. 76
  24. 72
  25. 7
  26. 56
  27. 42
  28. 17
  29. 22
  30. 62
  31. 55
  32. 3
  33. 79
  34. 67
  35. 33
  36. 5
  37. 54
  38. 53
  39. 14
  40. 31

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