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Number Bonds Worksheet (to 10 and 100)

Mental maths lesson 1: Number bonds to 10 and 100 · Set 845 · 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. 1.47 + ? = 100
  2. 2.6 + ? = 10
  3. 3.43 + ? = 100
  4. 4.4 + ? = 10
  5. 5.44 + ? = 100
  6. 6.16 + ? = 100
  7. 7.21 + ? = 100
  8. 8.1 + ? = 10
  9. 9.3 + ? = 10
  10. 10.2 + ? = 10
  11. 11.23 + ? = 100
  12. 12.26 + ? = 100
  13. 13.45 + ? = 100
  14. 14.7 + ? = 10
  15. 15.57 + ? = 100
  16. 16.9 + ? = 10
  17. 17.52 + ? = 100
  18. 18.22 + ? = 100
  19. 19.41 + ? = 100
  20. 20.74 + ? = 100
  21. 21.77 + ? = 100
  22. 22.79 + ? = 100
  23. 23.30 + ? = 100
  24. 24.5 + ? = 10
  25. 25.68 + ? = 100
  26. 26.38 + ? = 100
  27. 27.51 + ? = 100
  28. 28.34 + ? = 100
  29. 29.69 + ? = 100
  30. 30.80 + ? = 100
  31. 31.20 + ? = 100
  32. 32.8 + ? = 10
  33. 33.61 + ? = 100
  34. 34.25 + ? = 100
  35. 35.86 + ? = 100
  36. 36.17 + ? = 100
  37. 37.13 + ? = 100
  38. 38.31 + ? = 100
  39. 39.49 + ? = 100
  40. 40.24 + ? = 100

Answer key

  1. 53
  2. 4
  3. 57
  4. 6
  5. 56
  6. 84
  7. 79
  8. 9
  9. 7
  10. 8
  11. 77
  12. 74
  13. 55
  14. 3
  15. 43
  16. 1
  17. 48
  18. 78
  19. 59
  20. 26
  21. 23
  22. 21
  23. 70
  24. 5
  25. 32
  26. 62
  27. 49
  28. 66
  29. 31
  30. 20
  31. 80
  32. 2
  33. 39
  34. 75
  35. 14
  36. 83
  37. 87
  38. 69
  39. 51
  40. 76

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