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Number Bonds Worksheet (to 10 and 100)

Mental maths lesson 1: Number bonds to 10 and 100 · Set 774 · 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. 1.1 + ? = 10
  2. 2.8 + ? = 10
  3. 3.38 + ? = 100
  4. 4.47 + ? = 100
  5. 5.3 + ? = 10
  6. 6.9 + ? = 10
  7. 7.77 + ? = 100
  8. 8.6 + ? = 10
  9. 9.2 + ? = 10
  10. 10.35 + ? = 100
  11. 11.86 + ? = 100
  12. 12.76 + ? = 100
  13. 13.4 + ? = 10
  14. 14.67 + ? = 100
  15. 15.5 + ? = 10
  16. 16.7 + ? = 10
  17. 17.33 + ? = 100
  18. 18.52 + ? = 100
  19. 19.88 + ? = 100
  20. 20.21 + ? = 100
  21. 21.69 + ? = 100
  22. 22.43 + ? = 100
  23. 23.79 + ? = 100
  24. 24.23 + ? = 100
  25. 25.28 + ? = 100
  26. 26.49 + ? = 100
  27. 27.56 + ? = 100
  28. 28.13 + ? = 100
  29. 29.68 + ? = 100
  30. 30.66 + ? = 100
  31. 31.51 + ? = 100
  32. 32.50 + ? = 100
  33. 33.73 + ? = 100
  34. 34.81 + ? = 100
  35. 35.54 + ? = 100
  36. 36.82 + ? = 100
  37. 37.53 + ? = 100
  38. 38.20 + ? = 100
  39. 39.36 + ? = 100
  40. 40.89 + ? = 100

Answer key

  1. 9
  2. 2
  3. 62
  4. 53
  5. 7
  6. 1
  7. 23
  8. 4
  9. 8
  10. 65
  11. 14
  12. 24
  13. 6
  14. 33
  15. 5
  16. 3
  17. 67
  18. 48
  19. 12
  20. 79
  21. 31
  22. 57
  23. 21
  24. 77
  25. 72
  26. 51
  27. 44
  28. 87
  29. 32
  30. 34
  31. 49
  32. 50
  33. 27
  34. 19
  35. 46
  36. 18
  37. 47
  38. 80
  39. 64
  40. 11

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