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Number Bonds Worksheet (to 10 and 100)

Mental maths lesson 1: Number bonds to 10 and 100 · Set 918 · 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. 1.2 + ? = 10
  2. 2.7 + ? = 10
  3. 3.71 + ? = 100
  4. 4.12 + ? = 100
  5. 5.9 + ? = 10
  6. 6.30 + ? = 100
  7. 7.13 + ? = 100
  8. 8.79 + ? = 100
  9. 9.39 + ? = 100
  10. 10.1 + ? = 10
  11. 11.29 + ? = 100
  12. 12.31 + ? = 100
  13. 13.3 + ? = 10
  14. 14.33 + ? = 100
  15. 15.40 + ? = 100
  16. 16.16 + ? = 100
  17. 17.38 + ? = 100
  18. 18.44 + ? = 100
  19. 19.6 + ? = 10
  20. 20.59 + ? = 100
  21. 21.26 + ? = 100
  22. 22.67 + ? = 100
  23. 23.5 + ? = 10
  24. 24.27 + ? = 100
  25. 25.48 + ? = 100
  26. 26.21 + ? = 100
  27. 27.89 + ? = 100
  28. 28.14 + ? = 100
  29. 29.47 + ? = 100
  30. 30.4 + ? = 10
  31. 31.52 + ? = 100
  32. 32.8 + ? = 10
  33. 33.24 + ? = 100
  34. 34.34 + ? = 100
  35. 35.15 + ? = 100
  36. 36.84 + ? = 100
  37. 37.20 + ? = 100
  38. 38.81 + ? = 100
  39. 39.18 + ? = 100
  40. 40.87 + ? = 100

Answer key

  1. 8
  2. 3
  3. 29
  4. 88
  5. 1
  6. 70
  7. 87
  8. 21
  9. 61
  10. 9
  11. 71
  12. 69
  13. 7
  14. 67
  15. 60
  16. 84
  17. 62
  18. 56
  19. 4
  20. 41
  21. 74
  22. 33
  23. 5
  24. 73
  25. 52
  26. 79
  27. 11
  28. 86
  29. 53
  30. 6
  31. 48
  32. 2
  33. 76
  34. 66
  35. 85
  36. 16
  37. 80
  38. 19
  39. 82
  40. 13

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