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Number Bonds Worksheet (to 10 and 100)

Mental maths lesson 1: Number bonds to 10 and 100 · Set 884 · 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. 1.3 + ? = 10
  2. 2.36 + ? = 100
  3. 3.60 + ? = 100
  4. 4.87 + ? = 100
  5. 5.51 + ? = 100
  6. 6.4 + ? = 10
  7. 7.9 + ? = 10
  8. 8.53 + ? = 100
  9. 9.1 + ? = 10
  10. 10.31 + ? = 100
  11. 11.11 + ? = 100
  12. 12.63 + ? = 100
  13. 13.71 + ? = 100
  14. 14.82 + ? = 100
  15. 15.42 + ? = 100
  16. 16.72 + ? = 100
  17. 17.25 + ? = 100
  18. 18.68 + ? = 100
  19. 19.65 + ? = 100
  20. 20.21 + ? = 100
  21. 21.26 + ? = 100
  22. 22.7 + ? = 10
  23. 23.2 + ? = 10
  24. 24.14 + ? = 100
  25. 25.80 + ? = 100
  26. 26.59 + ? = 100
  27. 27.6 + ? = 10
  28. 28.32 + ? = 100
  29. 29.41 + ? = 100
  30. 30.70 + ? = 100
  31. 31.8 + ? = 10
  32. 32.73 + ? = 100
  33. 33.49 + ? = 100
  34. 34.35 + ? = 100
  35. 35.40 + ? = 100
  36. 36.81 + ? = 100
  37. 37.67 + ? = 100
  38. 38.39 + ? = 100
  39. 39.74 + ? = 100
  40. 40.76 + ? = 100

Answer key

  1. 7
  2. 64
  3. 40
  4. 13
  5. 49
  6. 6
  7. 1
  8. 47
  9. 9
  10. 69
  11. 89
  12. 37
  13. 29
  14. 18
  15. 58
  16. 28
  17. 75
  18. 32
  19. 35
  20. 79
  21. 74
  22. 3
  23. 8
  24. 86
  25. 20
  26. 41
  27. 4
  28. 68
  29. 59
  30. 30
  31. 2
  32. 27
  33. 51
  34. 65
  35. 60
  36. 19
  37. 33
  38. 61
  39. 26
  40. 24

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