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Number Bonds Worksheet (to 10 and 100)

Mental maths lesson 1: Number bonds to 10 and 100 · Set 967 · 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. 1.3 + ? = 10
  2. 2.2 + ? = 10
  3. 3.56 + ? = 100
  4. 4.87 + ? = 100
  5. 5.73 + ? = 100
  6. 6.85 + ? = 100
  7. 7.1 + ? = 10
  8. 8.43 + ? = 100
  9. 9.4 + ? = 10
  10. 10.8 + ? = 10
  11. 11.6 + ? = 10
  12. 12.80 + ? = 100
  13. 13.5 + ? = 10
  14. 14.46 + ? = 100
  15. 15.41 + ? = 100
  16. 16.32 + ? = 100
  17. 17.25 + ? = 100
  18. 18.42 + ? = 100
  19. 19.26 + ? = 100
  20. 20.9 + ? = 10
  21. 21.35 + ? = 100
  22. 22.29 + ? = 100
  23. 23.79 + ? = 100
  24. 24.11 + ? = 100
  25. 25.62 + ? = 100
  26. 26.53 + ? = 100
  27. 27.7 + ? = 10
  28. 28.54 + ? = 100
  29. 29.83 + ? = 100
  30. 30.48 + ? = 100
  31. 31.45 + ? = 100
  32. 32.20 + ? = 100
  33. 33.31 + ? = 100
  34. 34.74 + ? = 100
  35. 35.64 + ? = 100
  36. 36.18 + ? = 100
  37. 37.13 + ? = 100
  38. 38.24 + ? = 100
  39. 39.34 + ? = 100
  40. 40.6 + ? = 10

Answer key

  1. 7
  2. 8
  3. 44
  4. 13
  5. 27
  6. 15
  7. 9
  8. 57
  9. 6
  10. 2
  11. 4
  12. 20
  13. 5
  14. 54
  15. 59
  16. 68
  17. 75
  18. 58
  19. 74
  20. 1
  21. 65
  22. 71
  23. 21
  24. 89
  25. 38
  26. 47
  27. 3
  28. 46
  29. 17
  30. 52
  31. 55
  32. 80
  33. 69
  34. 26
  35. 36
  36. 82
  37. 87
  38. 76
  39. 66
  40. 4

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