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Number Bonds Worksheet (to 10 and 100)

Mental maths lesson 1: Number bonds to 10 and 100 · Set 324 · 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. 1.26 + ? = 100
  2. 2.2 + ? = 10
  3. 3.6 + ? = 10
  4. 4.5 + ? = 10
  5. 5.4 + ? = 10
  6. 6.53 + ? = 100
  7. 7.15 + ? = 100
  8. 8.27 + ? = 100
  9. 9.80 + ? = 100
  10. 10.20 + ? = 100
  11. 11.36 + ? = 100
  12. 12.79 + ? = 100
  13. 13.19 + ? = 100
  14. 14.48 + ? = 100
  15. 15.41 + ? = 100
  16. 16.88 + ? = 100
  17. 17.39 + ? = 100
  18. 18.43 + ? = 100
  19. 19.63 + ? = 100
  20. 20.7 + ? = 10
  21. 21.3 + ? = 10
  22. 22.17 + ? = 100
  23. 23.73 + ? = 100
  24. 24.9 + ? = 10
  25. 25.44 + ? = 100
  26. 26.1 + ? = 10
  27. 27.32 + ? = 100
  28. 28.87 + ? = 100
  29. 29.60 + ? = 100
  30. 30.67 + ? = 100
  31. 31.22 + ? = 100
  32. 32.72 + ? = 100
  33. 33.33 + ? = 100
  34. 34.8 + ? = 10
  35. 35.74 + ? = 100
  36. 36.68 + ? = 100
  37. 37.77 + ? = 100
  38. 38.76 + ? = 100
  39. 39.35 + ? = 100
  40. 40.89 + ? = 100

Answer key

  1. 74
  2. 8
  3. 4
  4. 5
  5. 6
  6. 47
  7. 85
  8. 73
  9. 20
  10. 80
  11. 64
  12. 21
  13. 81
  14. 52
  15. 59
  16. 12
  17. 61
  18. 57
  19. 37
  20. 3
  21. 7
  22. 83
  23. 27
  24. 1
  25. 56
  26. 9
  27. 68
  28. 13
  29. 40
  30. 33
  31. 78
  32. 28
  33. 67
  34. 2
  35. 26
  36. 32
  37. 23
  38. 24
  39. 65
  40. 11

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