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Number Bonds Worksheet (to 10 and 100)

Mental maths lesson 1: Number bonds to 10 and 100 · Set 771 · 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. 1.52 + ? = 100
  2. 2.4 + ? = 10
  3. 3.77 + ? = 100
  4. 4.75 + ? = 100
  5. 5.1 + ? = 10
  6. 6.44 + ? = 100
  7. 7.7 + ? = 10
  8. 8.2 + ? = 10
  9. 9.70 + ? = 100
  10. 10.29 + ? = 100
  11. 11.26 + ? = 100
  12. 12.22 + ? = 100
  13. 13.85 + ? = 100
  14. 14.18 + ? = 100
  15. 15.5 + ? = 10
  16. 16.6 + ? = 10
  17. 17.83 + ? = 100
  18. 18.31 + ? = 100
  19. 19.57 + ? = 100
  20. 20.69 + ? = 100
  21. 21.61 + ? = 100
  22. 22.81 + ? = 100
  23. 23.9 + ? = 10
  24. 24.30 + ? = 100
  25. 25.65 + ? = 100
  26. 26.21 + ? = 100
  27. 27.37 + ? = 100
  28. 28.12 + ? = 100
  29. 29.66 + ? = 100
  30. 30.35 + ? = 100
  31. 31.8 + ? = 10
  32. 32.3 + ? = 10
  33. 33.23 + ? = 100
  34. 34.79 + ? = 100
  35. 35.47 + ? = 100
  36. 36.67 + ? = 100
  37. 37.49 + ? = 100
  38. 38.38 + ? = 100
  39. 39.72 + ? = 100
  40. 40.84 + ? = 100

Answer key

  1. 48
  2. 6
  3. 23
  4. 25
  5. 9
  6. 56
  7. 3
  8. 8
  9. 30
  10. 71
  11. 74
  12. 78
  13. 15
  14. 82
  15. 5
  16. 4
  17. 17
  18. 69
  19. 43
  20. 31
  21. 39
  22. 19
  23. 1
  24. 70
  25. 35
  26. 79
  27. 63
  28. 88
  29. 34
  30. 65
  31. 2
  32. 7
  33. 77
  34. 21
  35. 53
  36. 33
  37. 51
  38. 62
  39. 28
  40. 16

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