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Number Bonds Worksheet (to 10 and 100)

Mental maths lesson 1: Number bonds to 10 and 100 · Set 917 · 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. 1.4 + ? = 10
  2. 2.42 + ? = 100
  3. 3.2 + ? = 10
  4. 4.7 + ? = 10
  5. 5.3 + ? = 10
  6. 6.68 + ? = 100
  7. 7.61 + ? = 100
  8. 8.59 + ? = 100
  9. 9.31 + ? = 100
  10. 10.58 + ? = 100
  11. 11.8 + ? = 10
  12. 12.9 + ? = 10
  13. 13.29 + ? = 100
  14. 14.25 + ? = 100
  15. 15.1 + ? = 10
  16. 16.12 + ? = 100
  17. 17.22 + ? = 100
  18. 18.46 + ? = 100
  19. 19.27 + ? = 100
  20. 20.6 + ? = 10
  21. 21.43 + ? = 100
  22. 22.20 + ? = 100
  23. 23.39 + ? = 100
  24. 24.34 + ? = 100
  25. 25.89 + ? = 100
  26. 26.5 + ? = 10
  27. 27.30 + ? = 100
  28. 28.49 + ? = 100
  29. 29.63 + ? = 100
  30. 30.17 + ? = 100
  31. 31.67 + ? = 100
  32. 32.41 + ? = 100
  33. 33.80 + ? = 100
  34. 34.38 + ? = 100
  35. 35.23 + ? = 100
  36. 36.83 + ? = 100
  37. 37.74 + ? = 100
  38. 38.45 + ? = 100
  39. 39.33 + ? = 100
  40. 40.16 + ? = 100

Answer key

  1. 6
  2. 58
  3. 8
  4. 3
  5. 7
  6. 32
  7. 39
  8. 41
  9. 69
  10. 42
  11. 2
  12. 1
  13. 71
  14. 75
  15. 9
  16. 88
  17. 78
  18. 54
  19. 73
  20. 4
  21. 57
  22. 80
  23. 61
  24. 66
  25. 11
  26. 5
  27. 70
  28. 51
  29. 37
  30. 83
  31. 33
  32. 59
  33. 20
  34. 62
  35. 77
  36. 17
  37. 26
  38. 55
  39. 67
  40. 84

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