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Number Bonds Worksheet (to 10 and 100)

Mental maths lesson 1: Number bonds to 10 and 100 · Set 932 · 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. 1.1 + ? = 10
  2. 2.82 + ? = 100
  3. 3.87 + ? = 100
  4. 4.72 + ? = 100
  5. 5.4 + ? = 10
  6. 6.80 + ? = 100
  7. 7.3 + ? = 10
  8. 8.43 + ? = 100
  9. 9.5 + ? = 10
  10. 10.38 + ? = 100
  11. 11.6 + ? = 10
  12. 12.64 + ? = 100
  13. 13.31 + ? = 100
  14. 14.26 + ? = 100
  15. 15.20 + ? = 100
  16. 16.2 + ? = 10
  17. 17.9 + ? = 10
  18. 18.79 + ? = 100
  19. 19.7 + ? = 10
  20. 20.17 + ? = 100
  21. 21.12 + ? = 100
  22. 22.66 + ? = 100
  23. 23.76 + ? = 100
  24. 24.27 + ? = 100
  25. 25.36 + ? = 100
  26. 26.85 + ? = 100
  27. 27.30 + ? = 100
  28. 28.57 + ? = 100
  29. 29.40 + ? = 100
  30. 30.15 + ? = 100
  31. 31.56 + ? = 100
  32. 32.24 + ? = 100
  33. 33.46 + ? = 100
  34. 34.42 + ? = 100
  35. 35.53 + ? = 100
  36. 36.19 + ? = 100
  37. 37.61 + ? = 100
  38. 38.67 + ? = 100
  39. 39.16 + ? = 100
  40. 40.13 + ? = 100

Answer key

  1. 9
  2. 18
  3. 13
  4. 28
  5. 6
  6. 20
  7. 7
  8. 57
  9. 5
  10. 62
  11. 4
  12. 36
  13. 69
  14. 74
  15. 80
  16. 8
  17. 1
  18. 21
  19. 3
  20. 83
  21. 88
  22. 34
  23. 24
  24. 73
  25. 64
  26. 15
  27. 70
  28. 43
  29. 60
  30. 85
  31. 44
  32. 76
  33. 54
  34. 58
  35. 47
  36. 81
  37. 39
  38. 33
  39. 84
  40. 87

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