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Number Bonds Worksheet (to 10 and 100)

Mental maths lesson 1: Number bonds to 10 and 100 · Set 804 · 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. 1.33 + ? = 100
  2. 2.22 + ? = 100
  3. 3.4 + ? = 10
  4. 4.5 + ? = 10
  5. 5.3 + ? = 10
  6. 6.76 + ? = 100
  7. 7.86 + ? = 100
  8. 8.72 + ? = 100
  9. 9.12 + ? = 100
  10. 10.20 + ? = 100
  11. 11.44 + ? = 100
  12. 12.2 + ? = 10
  13. 13.75 + ? = 100
  14. 14.57 + ? = 100
  15. 15.70 + ? = 100
  16. 16.25 + ? = 100
  17. 17.62 + ? = 100
  18. 18.73 + ? = 100
  19. 19.9 + ? = 10
  20. 20.29 + ? = 100
  21. 21.45 + ? = 100
  22. 22.23 + ? = 100
  23. 23.60 + ? = 100
  24. 24.89 + ? = 100
  25. 25.1 + ? = 10
  26. 26.51 + ? = 100
  27. 27.6 + ? = 10
  28. 28.8 + ? = 10
  29. 29.16 + ? = 100
  30. 30.59 + ? = 100
  31. 31.88 + ? = 100
  32. 32.31 + ? = 100
  33. 33.85 + ? = 100
  34. 34.82 + ? = 100
  35. 35.7 + ? = 10
  36. 36.36 + ? = 100
  37. 37.13 + ? = 100
  38. 38.79 + ? = 100
  39. 39.11 + ? = 100
  40. 40.26 + ? = 100

Answer key

  1. 67
  2. 78
  3. 6
  4. 5
  5. 7
  6. 24
  7. 14
  8. 28
  9. 88
  10. 80
  11. 56
  12. 8
  13. 25
  14. 43
  15. 30
  16. 75
  17. 38
  18. 27
  19. 1
  20. 71
  21. 55
  22. 77
  23. 40
  24. 11
  25. 9
  26. 49
  27. 4
  28. 2
  29. 84
  30. 41
  31. 12
  32. 69
  33. 15
  34. 18
  35. 3
  36. 64
  37. 87
  38. 21
  39. 89
  40. 74

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