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Number Bonds Worksheet (to 10 and 100)

Mental maths lesson 1: Number bonds to 10 and 100 · Set 757 · 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. 1.81 + ? = 100
  2. 2.89 + ? = 100
  3. 3.9 + ? = 10
  4. 4.7 + ? = 10
  5. 5.70 + ? = 100
  6. 6.31 + ? = 100
  7. 7.64 + ? = 100
  8. 8.3 + ? = 10
  9. 9.55 + ? = 100
  10. 10.78 + ? = 100
  11. 11.29 + ? = 100
  12. 12.1 + ? = 10
  13. 13.77 + ? = 100
  14. 14.32 + ? = 100
  15. 15.24 + ? = 100
  16. 16.86 + ? = 100
  17. 17.8 + ? = 10
  18. 18.2 + ? = 10
  19. 19.6 + ? = 10
  20. 20.4 + ? = 10
  21. 21.62 + ? = 100
  22. 22.5 + ? = 10
  23. 23.52 + ? = 100
  24. 24.37 + ? = 100
  25. 25.19 + ? = 100
  26. 26.47 + ? = 100
  27. 27.21 + ? = 100
  28. 28.59 + ? = 100
  29. 29.25 + ? = 100
  30. 30.30 + ? = 100
  31. 31.23 + ? = 100
  32. 32.49 + ? = 100
  33. 33.68 + ? = 100
  34. 34.58 + ? = 100
  35. 35.35 + ? = 100
  36. 36.41 + ? = 100
  37. 37.14 + ? = 100
  38. 38.40 + ? = 100
  39. 39.20 + ? = 100
  40. 40.44 + ? = 100

Answer key

  1. 19
  2. 11
  3. 1
  4. 3
  5. 30
  6. 69
  7. 36
  8. 7
  9. 45
  10. 22
  11. 71
  12. 9
  13. 23
  14. 68
  15. 76
  16. 14
  17. 2
  18. 8
  19. 4
  20. 6
  21. 38
  22. 5
  23. 48
  24. 63
  25. 81
  26. 53
  27. 79
  28. 41
  29. 75
  30. 70
  31. 77
  32. 51
  33. 32
  34. 42
  35. 65
  36. 59
  37. 86
  38. 60
  39. 80
  40. 56

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