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Number Bonds Worksheet (to 10 and 100)

Mental maths lesson 1: Number bonds to 10 and 100 · Set 629 · 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. 2.4 + ? = 10
  3. 3.5 + ? = 10
  4. 4.2 + ? = 10
  5. 5.9 + ? = 10
  6. 6.52 + ? = 100
  7. 7.1 + ? = 10
  8. 8.7 + ? = 10
  9. 9.3 + ? = 10
  10. 10.64 + ? = 100
  11. 11.65 + ? = 100
  12. 12.38 + ? = 100
  13. 13.66 + ? = 100
  14. 14.31 + ? = 100
  15. 15.88 + ? = 100
  16. 16.43 + ? = 100
  17. 17.60 + ? = 100
  18. 18.55 + ? = 100
  19. 19.33 + ? = 100
  20. 20.41 + ? = 100
  21. 21.21 + ? = 100
  22. 22.50 + ? = 100
  23. 23.89 + ? = 100
  24. 24.86 + ? = 100
  25. 25.82 + ? = 100
  26. 26.6 + ? = 10
  27. 27.44 + ? = 100
  28. 28.56 + ? = 100
  29. 29.15 + ? = 100
  30. 30.17 + ? = 100
  31. 31.14 + ? = 100
  32. 32.74 + ? = 100
  33. 33.8 + ? = 10
  34. 34.83 + ? = 100
  35. 35.68 + ? = 100
  36. 36.53 + ? = 100
  37. 37.37 + ? = 100
  38. 38.58 + ? = 100
  39. 39.22 + ? = 100
  40. 40.47 + ? = 100

Answer key

  1. 30
  2. 6
  3. 5
  4. 8
  5. 1
  6. 48
  7. 9
  8. 3
  9. 7
  10. 36
  11. 35
  12. 62
  13. 34
  14. 69
  15. 12
  16. 57
  17. 40
  18. 45
  19. 67
  20. 59
  21. 79
  22. 50
  23. 11
  24. 14
  25. 18
  26. 4
  27. 56
  28. 44
  29. 85
  30. 83
  31. 86
  32. 26
  33. 2
  34. 17
  35. 32
  36. 47
  37. 63
  38. 42
  39. 78
  40. 53

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