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Number Bonds Worksheet (to 10 and 100)

Mental maths lesson 1: Number bonds to 10 and 100 · Set 925 · 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. 1.8 + ? = 10
  2. 2.70 + ? = 100
  3. 3.30 + ? = 100
  4. 4.1 + ? = 10
  5. 5.16 + ? = 100
  6. 6.71 + ? = 100
  7. 7.5 + ? = 10
  8. 8.28 + ? = 100
  9. 9.53 + ? = 100
  10. 10.59 + ? = 100
  11. 11.44 + ? = 100
  12. 12.72 + ? = 100
  13. 13.42 + ? = 100
  14. 14.6 + ? = 10
  15. 15.36 + ? = 100
  16. 16.7 + ? = 10
  17. 17.24 + ? = 100
  18. 18.2 + ? = 10
  19. 19.63 + ? = 100
  20. 20.9 + ? = 10
  21. 21.15 + ? = 100
  22. 22.51 + ? = 100
  23. 23.69 + ? = 100
  24. 24.89 + ? = 100
  25. 25.80 + ? = 100
  26. 26.22 + ? = 100
  27. 27.3 + ? = 10
  28. 28.26 + ? = 100
  29. 29.40 + ? = 100
  30. 30.64 + ? = 100
  31. 31.77 + ? = 100
  32. 32.29 + ? = 100
  33. 33.19 + ? = 100
  34. 34.13 + ? = 100
  35. 35.23 + ? = 100
  36. 36.48 + ? = 100
  37. 37.54 + ? = 100
  38. 38.4 + ? = 10
  39. 39.11 + ? = 100
  40. 40.65 + ? = 100

Answer key

  1. 2
  2. 30
  3. 70
  4. 9
  5. 84
  6. 29
  7. 5
  8. 72
  9. 47
  10. 41
  11. 56
  12. 28
  13. 58
  14. 4
  15. 64
  16. 3
  17. 76
  18. 8
  19. 37
  20. 1
  21. 85
  22. 49
  23. 31
  24. 11
  25. 20
  26. 78
  27. 7
  28. 74
  29. 60
  30. 36
  31. 23
  32. 71
  33. 81
  34. 87
  35. 77
  36. 52
  37. 46
  38. 6
  39. 89
  40. 35

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