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Number Bonds Worksheet (to 10 and 100)

Mental maths lesson 1: Number bonds to 10 and 100 · Set 931 · 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. 1.2 + ? = 10
  2. 2.60 + ? = 100
  3. 3.4 + ? = 10
  4. 4.68 + ? = 100
  5. 5.26 + ? = 100
  6. 6.43 + ? = 100
  7. 7.12 + ? = 100
  8. 8.86 + ? = 100
  9. 9.67 + ? = 100
  10. 10.1 + ? = 10
  11. 11.39 + ? = 100
  12. 12.8 + ? = 10
  13. 13.16 + ? = 100
  14. 14.36 + ? = 100
  15. 15.77 + ? = 100
  16. 16.5 + ? = 10
  17. 17.14 + ? = 100
  18. 18.81 + ? = 100
  19. 19.7 + ? = 10
  20. 20.45 + ? = 100
  21. 21.48 + ? = 100
  22. 22.21 + ? = 100
  23. 23.37 + ? = 100
  24. 24.54 + ? = 100
  25. 25.22 + ? = 100
  26. 26.33 + ? = 100
  27. 27.85 + ? = 100
  28. 28.6 + ? = 10
  29. 29.9 + ? = 10
  30. 30.47 + ? = 100
  31. 31.64 + ? = 100
  32. 32.72 + ? = 100
  33. 33.84 + ? = 100
  34. 34.3 + ? = 10
  35. 35.49 + ? = 100
  36. 36.24 + ? = 100
  37. 37.82 + ? = 100
  38. 38.11 + ? = 100
  39. 39.70 + ? = 100
  40. 40.30 + ? = 100

Answer key

  1. 8
  2. 40
  3. 6
  4. 32
  5. 74
  6. 57
  7. 88
  8. 14
  9. 33
  10. 9
  11. 61
  12. 2
  13. 84
  14. 64
  15. 23
  16. 5
  17. 86
  18. 19
  19. 3
  20. 55
  21. 52
  22. 79
  23. 63
  24. 46
  25. 78
  26. 67
  27. 15
  28. 4
  29. 1
  30. 53
  31. 36
  32. 28
  33. 16
  34. 7
  35. 51
  36. 76
  37. 18
  38. 89
  39. 30
  40. 70

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