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Number Bonds Worksheet (to 10 and 100)

Mental maths lesson 1: Number bonds to 10 and 100 · Set 783 · 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. 1.6 + ? = 10
  2. 2.4 + ? = 10
  3. 3.8 + ? = 10
  4. 4.40 + ? = 100
  5. 5.16 + ? = 100
  6. 6.2 + ? = 10
  7. 7.12 + ? = 100
  8. 8.64 + ? = 100
  9. 9.1 + ? = 10
  10. 10.7 + ? = 10
  11. 11.3 + ? = 10
  12. 12.53 + ? = 100
  13. 13.37 + ? = 100
  14. 14.19 + ? = 100
  15. 15.13 + ? = 100
  16. 16.83 + ? = 100
  17. 17.85 + ? = 100
  18. 18.24 + ? = 100
  19. 19.36 + ? = 100
  20. 20.73 + ? = 100
  21. 21.30 + ? = 100
  22. 22.28 + ? = 100
  23. 23.34 + ? = 100
  24. 24.87 + ? = 100
  25. 25.59 + ? = 100
  26. 26.23 + ? = 100
  27. 27.17 + ? = 100
  28. 28.18 + ? = 100
  29. 29.79 + ? = 100
  30. 30.81 + ? = 100
  31. 31.45 + ? = 100
  32. 32.67 + ? = 100
  33. 33.74 + ? = 100
  34. 34.11 + ? = 100
  35. 35.44 + ? = 100
  36. 36.20 + ? = 100
  37. 37.56 + ? = 100
  38. 38.27 + ? = 100
  39. 39.48 + ? = 100
  40. 40.9 + ? = 10

Answer key

  1. 4
  2. 6
  3. 2
  4. 60
  5. 84
  6. 8
  7. 88
  8. 36
  9. 9
  10. 3
  11. 7
  12. 47
  13. 63
  14. 81
  15. 87
  16. 17
  17. 15
  18. 76
  19. 64
  20. 27
  21. 70
  22. 72
  23. 66
  24. 13
  25. 41
  26. 77
  27. 83
  28. 82
  29. 21
  30. 19
  31. 55
  32. 33
  33. 26
  34. 89
  35. 56
  36. 80
  37. 44
  38. 73
  39. 52
  40. 1

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