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Number Bonds Worksheet (to 10 and 100)

Mental maths lesson 1: Number bonds to 10 and 100 · Set 916 · 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. 1.9 + ? = 10
  2. 2.50 + ? = 100
  3. 3.61 + ? = 100
  4. 4.41 + ? = 100
  5. 5.2 + ? = 10
  6. 6.27 + ? = 100
  7. 7.4 + ? = 10
  8. 8.34 + ? = 100
  9. 9.21 + ? = 100
  10. 10.18 + ? = 100
  11. 11.65 + ? = 100
  12. 12.7 + ? = 10
  13. 13.17 + ? = 100
  14. 14.85 + ? = 100
  15. 15.5 + ? = 10
  16. 16.37 + ? = 100
  17. 17.1 + ? = 10
  18. 18.71 + ? = 100
  19. 19.64 + ? = 100
  20. 20.6 + ? = 10
  21. 21.70 + ? = 100
  22. 22.3 + ? = 10
  23. 23.51 + ? = 100
  24. 24.74 + ? = 100
  25. 25.83 + ? = 100
  26. 26.73 + ? = 100
  27. 27.81 + ? = 100
  28. 28.35 + ? = 100
  29. 29.8 + ? = 10
  30. 30.68 + ? = 100
  31. 31.72 + ? = 100
  32. 32.87 + ? = 100
  33. 33.20 + ? = 100
  34. 34.82 + ? = 100
  35. 35.55 + ? = 100
  36. 36.19 + ? = 100
  37. 37.30 + ? = 100
  38. 38.23 + ? = 100
  39. 39.22 + ? = 100
  40. 40.49 + ? = 100

Answer key

  1. 1
  2. 50
  3. 39
  4. 59
  5. 8
  6. 73
  7. 6
  8. 66
  9. 79
  10. 82
  11. 35
  12. 3
  13. 83
  14. 15
  15. 5
  16. 63
  17. 9
  18. 29
  19. 36
  20. 4
  21. 30
  22. 7
  23. 49
  24. 26
  25. 17
  26. 27
  27. 19
  28. 65
  29. 2
  30. 32
  31. 28
  32. 13
  33. 80
  34. 18
  35. 45
  36. 81
  37. 70
  38. 77
  39. 78
  40. 51

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