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Number Bonds Worksheet (to 10 and 100)

Mental maths lesson 1: Number bonds to 10 and 100 · Set 926 · 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. 1.7 + ? = 10
  2. 2.1 + ? = 10
  3. 3.8 + ? = 10
  4. 4.9 + ? = 10
  5. 5.87 + ? = 100
  6. 6.5 + ? = 10
  7. 7.49 + ? = 100
  8. 8.26 + ? = 100
  9. 9.24 + ? = 100
  10. 10.75 + ? = 100
  11. 11.2 + ? = 10
  12. 12.4 + ? = 10
  13. 13.27 + ? = 100
  14. 14.37 + ? = 100
  15. 15.54 + ? = 100
  16. 16.51 + ? = 100
  17. 17.79 + ? = 100
  18. 18.15 + ? = 100
  19. 19.19 + ? = 100
  20. 20.81 + ? = 100
  21. 21.23 + ? = 100
  22. 22.35 + ? = 100
  23. 23.82 + ? = 100
  24. 24.41 + ? = 100
  25. 25.59 + ? = 100
  26. 26.16 + ? = 100
  27. 27.13 + ? = 100
  28. 28.84 + ? = 100
  29. 29.47 + ? = 100
  30. 30.77 + ? = 100
  31. 31.74 + ? = 100
  32. 32.6 + ? = 10
  33. 33.40 + ? = 100
  34. 34.71 + ? = 100
  35. 35.67 + ? = 100
  36. 36.28 + ? = 100
  37. 37.34 + ? = 100
  38. 38.57 + ? = 100
  39. 39.53 + ? = 100
  40. 40.72 + ? = 100

Answer key

  1. 3
  2. 9
  3. 2
  4. 1
  5. 13
  6. 5
  7. 51
  8. 74
  9. 76
  10. 25
  11. 8
  12. 6
  13. 73
  14. 63
  15. 46
  16. 49
  17. 21
  18. 85
  19. 81
  20. 19
  21. 77
  22. 65
  23. 18
  24. 59
  25. 41
  26. 84
  27. 87
  28. 16
  29. 53
  30. 23
  31. 26
  32. 4
  33. 60
  34. 29
  35. 33
  36. 72
  37. 66
  38. 43
  39. 47
  40. 28

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