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Number Bonds Worksheet (to 10 and 100)

Mental maths lesson 1: Number bonds to 10 and 100 · Set 955 · 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. 1.89 + ? = 100
  2. 2.5 + ? = 10
  3. 3.81 + ? = 100
  4. 4.1 + ? = 10
  5. 5.50 + ? = 100
  6. 6.56 + ? = 100
  7. 7.3 + ? = 10
  8. 8.69 + ? = 100
  9. 9.57 + ? = 100
  10. 10.4 + ? = 10
  11. 11.82 + ? = 100
  12. 12.76 + ? = 100
  13. 13.30 + ? = 100
  14. 14.21 + ? = 100
  15. 15.65 + ? = 100
  16. 16.7 + ? = 10
  17. 17.78 + ? = 100
  18. 18.35 + ? = 100
  19. 19.2 + ? = 10
  20. 20.18 + ? = 100
  21. 21.12 + ? = 100
  22. 22.9 + ? = 10
  23. 23.6 + ? = 10
  24. 24.47 + ? = 100
  25. 25.11 + ? = 100
  26. 26.14 + ? = 100
  27. 27.8 + ? = 10
  28. 28.80 + ? = 100
  29. 29.33 + ? = 100
  30. 30.60 + ? = 100
  31. 31.24 + ? = 100
  32. 32.26 + ? = 100
  33. 33.38 + ? = 100
  34. 34.31 + ? = 100
  35. 35.22 + ? = 100
  36. 36.83 + ? = 100
  37. 37.79 + ? = 100
  38. 38.41 + ? = 100
  39. 39.63 + ? = 100
  40. 40.28 + ? = 100

Answer key

  1. 11
  2. 5
  3. 19
  4. 9
  5. 50
  6. 44
  7. 7
  8. 31
  9. 43
  10. 6
  11. 18
  12. 24
  13. 70
  14. 79
  15. 35
  16. 3
  17. 22
  18. 65
  19. 8
  20. 82
  21. 88
  22. 1
  23. 4
  24. 53
  25. 89
  26. 86
  27. 2
  28. 20
  29. 67
  30. 40
  31. 76
  32. 74
  33. 62
  34. 69
  35. 78
  36. 17
  37. 21
  38. 59
  39. 37
  40. 72

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