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Number Bonds Worksheet (to 10 and 100)

Mental maths lesson 1: Number bonds to 10 and 100 · Set 996 · 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. 2.4 + ? = 10
  3. 3.83 + ? = 100
  4. 4.17 + ? = 100
  5. 5.46 + ? = 100
  6. 6.45 + ? = 100
  7. 7.37 + ? = 100
  8. 8.8 + ? = 10
  9. 9.1 + ? = 10
  10. 10.5 + ? = 10
  11. 11.7 + ? = 10
  12. 12.2 + ? = 10
  13. 13.33 + ? = 100
  14. 14.21 + ? = 100
  15. 15.73 + ? = 100
  16. 16.3 + ? = 10
  17. 17.32 + ? = 100
  18. 18.6 + ? = 10
  19. 19.41 + ? = 100
  20. 20.67 + ? = 100
  21. 21.72 + ? = 100
  22. 22.60 + ? = 100
  23. 23.65 + ? = 100
  24. 24.22 + ? = 100
  25. 25.39 + ? = 100
  26. 26.11 + ? = 100
  27. 27.12 + ? = 100
  28. 28.30 + ? = 100
  29. 29.82 + ? = 100
  30. 30.88 + ? = 100
  31. 31.40 + ? = 100
  32. 32.74 + ? = 100
  33. 33.85 + ? = 100
  34. 34.64 + ? = 100
  35. 35.63 + ? = 100
  36. 36.79 + ? = 100
  37. 37.58 + ? = 100
  38. 38.54 + ? = 100
  39. 39.52 + ? = 100
  40. 40.66 + ? = 100

Answer key

  1. 1
  2. 6
  3. 17
  4. 83
  5. 54
  6. 55
  7. 63
  8. 2
  9. 9
  10. 5
  11. 3
  12. 8
  13. 67
  14. 79
  15. 27
  16. 7
  17. 68
  18. 4
  19. 59
  20. 33
  21. 28
  22. 40
  23. 35
  24. 78
  25. 61
  26. 89
  27. 88
  28. 70
  29. 18
  30. 12
  31. 60
  32. 26
  33. 15
  34. 36
  35. 37
  36. 21
  37. 42
  38. 46
  39. 48
  40. 34

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