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Number Bonds Worksheet (to 10 and 100)

Mental maths lesson 1: Number bonds to 10 and 100 · Set 770 · 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. 1.8 + ? = 10
  2. 2.61 + ? = 100
  3. 3.9 + ? = 10
  4. 4.75 + ? = 100
  5. 5.77 + ? = 100
  6. 6.27 + ? = 100
  7. 7.4 + ? = 10
  8. 8.1 + ? = 10
  9. 9.55 + ? = 100
  10. 10.67 + ? = 100
  11. 11.38 + ? = 100
  12. 12.73 + ? = 100
  13. 13.45 + ? = 100
  14. 14.56 + ? = 100
  15. 15.2 + ? = 10
  16. 16.7 + ? = 10
  17. 17.6 + ? = 10
  18. 18.39 + ? = 100
  19. 19.44 + ? = 100
  20. 20.60 + ? = 100
  21. 21.3 + ? = 10
  22. 22.26 + ? = 100
  23. 23.47 + ? = 100
  24. 24.49 + ? = 100
  25. 25.5 + ? = 10
  26. 26.66 + ? = 100
  27. 27.84 + ? = 100
  28. 28.11 + ? = 100
  29. 29.79 + ? = 100
  30. 30.20 + ? = 100
  31. 31.22 + ? = 100
  32. 32.50 + ? = 100
  33. 33.74 + ? = 100
  34. 34.21 + ? = 100
  35. 35.64 + ? = 100
  36. 36.53 + ? = 100
  37. 37.86 + ? = 100
  38. 38.24 + ? = 100
  39. 39.85 + ? = 100
  40. 40.31 + ? = 100

Answer key

  1. 2
  2. 39
  3. 1
  4. 25
  5. 23
  6. 73
  7. 6
  8. 9
  9. 45
  10. 33
  11. 62
  12. 27
  13. 55
  14. 44
  15. 8
  16. 3
  17. 4
  18. 61
  19. 56
  20. 40
  21. 7
  22. 74
  23. 53
  24. 51
  25. 5
  26. 34
  27. 16
  28. 89
  29. 21
  30. 80
  31. 78
  32. 50
  33. 26
  34. 79
  35. 36
  36. 47
  37. 14
  38. 76
  39. 15
  40. 69

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