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Number Bonds Worksheet (to 10 and 100)

Mental maths lesson 1: Number bonds to 10 and 100 · Set 720 · 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. 1.7 + ? = 10
  2. 2.4 + ? = 10
  3. 3.38 + ? = 100
  4. 4.3 + ? = 10
  5. 5.69 + ? = 100
  6. 6.61 + ? = 100
  7. 7.33 + ? = 100
  8. 8.81 + ? = 100
  9. 9.1 + ? = 10
  10. 10.8 + ? = 10
  11. 11.2 + ? = 10
  12. 12.49 + ? = 100
  13. 13.60 + ? = 100
  14. 14.9 + ? = 10
  15. 15.16 + ? = 100
  16. 16.59 + ? = 100
  17. 17.77 + ? = 100
  18. 18.76 + ? = 100
  19. 19.34 + ? = 100
  20. 20.57 + ? = 100
  21. 21.42 + ? = 100
  22. 22.11 + ? = 100
  23. 23.29 + ? = 100
  24. 24.21 + ? = 100
  25. 25.24 + ? = 100
  26. 26.36 + ? = 100
  27. 27.13 + ? = 100
  28. 28.65 + ? = 100
  29. 29.6 + ? = 10
  30. 30.66 + ? = 100
  31. 31.64 + ? = 100
  32. 32.14 + ? = 100
  33. 33.46 + ? = 100
  34. 34.3 + ? = 10
  35. 35.55 + ? = 100
  36. 36.72 + ? = 100
  37. 37.73 + ? = 100
  38. 38.86 + ? = 100
  39. 39.68 + ? = 100
  40. 40.79 + ? = 100

Answer key

  1. 3
  2. 6
  3. 62
  4. 7
  5. 31
  6. 39
  7. 67
  8. 19
  9. 9
  10. 2
  11. 8
  12. 51
  13. 40
  14. 1
  15. 84
  16. 41
  17. 23
  18. 24
  19. 66
  20. 43
  21. 58
  22. 89
  23. 71
  24. 79
  25. 76
  26. 64
  27. 87
  28. 35
  29. 4
  30. 34
  31. 36
  32. 86
  33. 54
  34. 7
  35. 45
  36. 28
  37. 27
  38. 14
  39. 32
  40. 21

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