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Number Bonds Worksheet (to 10 and 100)

Mental maths lesson 1: Number bonds to 10 and 100 · Set 855 · 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. 1.5 + ? = 10
  2. 2.63 + ? = 100
  3. 3.8 + ? = 10
  4. 4.16 + ? = 100
  5. 5.49 + ? = 100
  6. 6.15 + ? = 100
  7. 7.36 + ? = 100
  8. 8.4 + ? = 10
  9. 9.27 + ? = 100
  10. 10.33 + ? = 100
  11. 11.24 + ? = 100
  12. 12.60 + ? = 100
  13. 13.70 + ? = 100
  14. 14.14 + ? = 100
  15. 15.2 + ? = 10
  16. 16.38 + ? = 100
  17. 17.89 + ? = 100
  18. 18.1 + ? = 10
  19. 19.7 + ? = 10
  20. 20.18 + ? = 100
  21. 21.69 + ? = 100
  22. 22.12 + ? = 100
  23. 23.55 + ? = 100
  24. 24.78 + ? = 100
  25. 25.85 + ? = 100
  26. 26.6 + ? = 10
  27. 27.20 + ? = 100
  28. 28.47 + ? = 100
  29. 29.54 + ? = 100
  30. 30.9 + ? = 10
  31. 31.19 + ? = 100
  32. 32.71 + ? = 100
  33. 33.30 + ? = 100
  34. 34.44 + ? = 100
  35. 35.64 + ? = 100
  36. 36.23 + ? = 100
  37. 37.53 + ? = 100
  38. 38.83 + ? = 100
  39. 39.86 + ? = 100
  40. 40.40 + ? = 100

Answer key

  1. 5
  2. 37
  3. 2
  4. 84
  5. 51
  6. 85
  7. 64
  8. 6
  9. 73
  10. 67
  11. 76
  12. 40
  13. 30
  14. 86
  15. 8
  16. 62
  17. 11
  18. 9
  19. 3
  20. 82
  21. 31
  22. 88
  23. 45
  24. 22
  25. 15
  26. 4
  27. 80
  28. 53
  29. 46
  30. 1
  31. 81
  32. 29
  33. 70
  34. 56
  35. 36
  36. 77
  37. 47
  38. 17
  39. 14
  40. 60

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