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Number Bonds Worksheet (to 10 and 100)

Mental maths lesson 1: Number bonds to 10 and 100 · Set 749 · 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. 1.59 + ? = 100
  2. 2.7 + ? = 10
  3. 3.41 + ? = 100
  4. 4.1 + ? = 10
  5. 5.72 + ? = 100
  6. 6.9 + ? = 10
  7. 7.4 + ? = 10
  8. 8.8 + ? = 10
  9. 9.6 + ? = 10
  10. 10.82 + ? = 100
  11. 11.13 + ? = 100
  12. 12.68 + ? = 100
  13. 13.30 + ? = 100
  14. 14.81 + ? = 100
  15. 15.5 + ? = 10
  16. 16.76 + ? = 100
  17. 17.2 + ? = 10
  18. 18.70 + ? = 100
  19. 19.3 + ? = 10
  20. 20.32 + ? = 100
  21. 21.36 + ? = 100
  22. 22.88 + ? = 100
  23. 23.50 + ? = 100
  24. 24.63 + ? = 100
  25. 25.31 + ? = 100
  26. 26.78 + ? = 100
  27. 27.19 + ? = 100
  28. 28.79 + ? = 100
  29. 29.52 + ? = 100
  30. 30.24 + ? = 100
  31. 31.69 + ? = 100
  32. 32.34 + ? = 100
  33. 33.55 + ? = 100
  34. 34.15 + ? = 100
  35. 35.12 + ? = 100
  36. 36.20 + ? = 100
  37. 37.11 + ? = 100
  38. 38.29 + ? = 100
  39. 39.27 + ? = 100
  40. 40.65 + ? = 100

Answer key

  1. 41
  2. 3
  3. 59
  4. 9
  5. 28
  6. 1
  7. 6
  8. 2
  9. 4
  10. 18
  11. 87
  12. 32
  13. 70
  14. 19
  15. 5
  16. 24
  17. 8
  18. 30
  19. 7
  20. 68
  21. 64
  22. 12
  23. 50
  24. 37
  25. 69
  26. 22
  27. 81
  28. 21
  29. 48
  30. 76
  31. 31
  32. 66
  33. 45
  34. 85
  35. 88
  36. 80
  37. 89
  38. 71
  39. 73
  40. 35

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