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Number Bonds Worksheet (to 10 and 100)

Mental maths lesson 1: Number bonds to 10 and 100 · Set 962 · 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. 1.49 + ? = 100
  2. 2.46 + ? = 100
  3. 3.1 + ? = 10
  4. 4.86 + ? = 100
  5. 5.47 + ? = 100
  6. 6.26 + ? = 100
  7. 7.58 + ? = 100
  8. 8.19 + ? = 100
  9. 9.7 + ? = 10
  10. 10.72 + ? = 100
  11. 11.4 + ? = 10
  12. 12.8 + ? = 10
  13. 13.15 + ? = 100
  14. 14.80 + ? = 100
  15. 15.52 + ? = 100
  16. 16.32 + ? = 100
  17. 17.9 + ? = 10
  18. 18.3 + ? = 10
  19. 19.74 + ? = 100
  20. 20.83 + ? = 100
  21. 21.6 + ? = 10
  22. 22.13 + ? = 100
  23. 23.28 + ? = 100
  24. 24.30 + ? = 100
  25. 25.34 + ? = 100
  26. 26.5 + ? = 10
  27. 27.73 + ? = 100
  28. 28.81 + ? = 100
  29. 29.2 + ? = 10
  30. 30.66 + ? = 100
  31. 31.23 + ? = 100
  32. 32.78 + ? = 100
  33. 33.71 + ? = 100
  34. 34.69 + ? = 100
  35. 35.50 + ? = 100
  36. 36.20 + ? = 100
  37. 37.40 + ? = 100
  38. 38.38 + ? = 100
  39. 39.76 + ? = 100
  40. 40.18 + ? = 100

Answer key

  1. 51
  2. 54
  3. 9
  4. 14
  5. 53
  6. 74
  7. 42
  8. 81
  9. 3
  10. 28
  11. 6
  12. 2
  13. 85
  14. 20
  15. 48
  16. 68
  17. 1
  18. 7
  19. 26
  20. 17
  21. 4
  22. 87
  23. 72
  24. 70
  25. 66
  26. 5
  27. 27
  28. 19
  29. 8
  30. 34
  31. 77
  32. 22
  33. 29
  34. 31
  35. 50
  36. 80
  37. 60
  38. 62
  39. 24
  40. 82

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