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Number Bonds Worksheet (to 10 and 100)

Mental maths lesson 1: Number bonds to 10 and 100 · Set 766 · 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. 1.66 + ? = 100
  2. 2.16 + ? = 100
  3. 3.29 + ? = 100
  4. 4.34 + ? = 100
  5. 5.51 + ? = 100
  6. 6.64 + ? = 100
  7. 7.82 + ? = 100
  8. 8.49 + ? = 100
  9. 9.1 + ? = 10
  10. 10.3 + ? = 10
  11. 11.31 + ? = 100
  12. 12.8 + ? = 10
  13. 13.4 + ? = 10
  14. 14.23 + ? = 100
  15. 15.45 + ? = 100
  16. 16.9 + ? = 10
  17. 17.20 + ? = 100
  18. 18.50 + ? = 100
  19. 19.37 + ? = 100
  20. 20.5 + ? = 10
  21. 21.72 + ? = 100
  22. 22.41 + ? = 100
  23. 23.56 + ? = 100
  24. 24.7 + ? = 10
  25. 25.52 + ? = 100
  26. 26.2 + ? = 10
  27. 27.2 + ? = 10
  28. 28.87 + ? = 100
  29. 29.61 + ? = 100
  30. 30.26 + ? = 100
  31. 31.40 + ? = 100
  32. 32.6 + ? = 10
  33. 33.44 + ? = 100
  34. 34.21 + ? = 100
  35. 35.11 + ? = 100
  36. 36.14 + ? = 100
  37. 37.89 + ? = 100
  38. 38.75 + ? = 100
  39. 39.12 + ? = 100
  40. 40.78 + ? = 100

Answer key

  1. 34
  2. 84
  3. 71
  4. 66
  5. 49
  6. 36
  7. 18
  8. 51
  9. 9
  10. 7
  11. 69
  12. 2
  13. 6
  14. 77
  15. 55
  16. 1
  17. 80
  18. 50
  19. 63
  20. 5
  21. 28
  22. 59
  23. 44
  24. 3
  25. 48
  26. 8
  27. 8
  28. 13
  29. 39
  30. 74
  31. 60
  32. 4
  33. 56
  34. 79
  35. 89
  36. 86
  37. 11
  38. 25
  39. 88
  40. 22

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