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Number Bonds Worksheet (to 10 and 100)

Mental maths lesson 1: Number bonds to 10 and 100 · Set 821 · 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. 1.22 + ? = 100
  2. 2.61 + ? = 100
  3. 3.76 + ? = 100
  4. 4.8 + ? = 10
  5. 5.7 + ? = 10
  6. 6.2 + ? = 10
  7. 7.6 + ? = 10
  8. 8.32 + ? = 100
  9. 9.26 + ? = 100
  10. 10.28 + ? = 100
  11. 11.12 + ? = 100
  12. 12.9 + ? = 10
  13. 13.3 + ? = 10
  14. 14.83 + ? = 100
  15. 15.54 + ? = 100
  16. 16.77 + ? = 100
  17. 17.43 + ? = 100
  18. 18.72 + ? = 100
  19. 19.89 + ? = 100
  20. 20.64 + ? = 100
  21. 21.78 + ? = 100
  22. 22.1 + ? = 10
  23. 23.5 + ? = 10
  24. 24.4 + ? = 10
  25. 25.50 + ? = 100
  26. 26.25 + ? = 100
  27. 27.23 + ? = 100
  28. 28.84 + ? = 100
  29. 29.47 + ? = 100
  30. 30.30 + ? = 100
  31. 31.48 + ? = 100
  32. 32.21 + ? = 100
  33. 33.62 + ? = 100
  34. 34.66 + ? = 100
  35. 35.24 + ? = 100
  36. 36.74 + ? = 100
  37. 37.87 + ? = 100
  38. 38.36 + ? = 100
  39. 39.19 + ? = 100
  40. 40.63 + ? = 100

Answer key

  1. 78
  2. 39
  3. 24
  4. 2
  5. 3
  6. 8
  7. 4
  8. 68
  9. 74
  10. 72
  11. 88
  12. 1
  13. 7
  14. 17
  15. 46
  16. 23
  17. 57
  18. 28
  19. 11
  20. 36
  21. 22
  22. 9
  23. 5
  24. 6
  25. 50
  26. 75
  27. 77
  28. 16
  29. 53
  30. 70
  31. 52
  32. 79
  33. 38
  34. 34
  35. 76
  36. 26
  37. 13
  38. 64
  39. 81
  40. 37

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