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Number Bonds Worksheet (to 10 and 100)

Mental maths lesson 1: Number bonds to 10 and 100 · Set 734 · 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. 1.47 + ? = 100
  2. 2.1 + ? = 10
  3. 3.17 + ? = 100
  4. 4.37 + ? = 100
  5. 5.2 + ? = 10
  6. 6.5 + ? = 10
  7. 7.8 + ? = 10
  8. 8.87 + ? = 100
  9. 9.3 + ? = 10
  10. 10.29 + ? = 100
  11. 11.55 + ? = 100
  12. 12.15 + ? = 100
  13. 13.65 + ? = 100
  14. 14.26 + ? = 100
  15. 15.79 + ? = 100
  16. 16.4 + ? = 10
  17. 17.30 + ? = 100
  18. 18.69 + ? = 100
  19. 19.9 + ? = 10
  20. 20.14 + ? = 100
  21. 21.44 + ? = 100
  22. 22.6 + ? = 10
  23. 23.27 + ? = 100
  24. 24.40 + ? = 100
  25. 25.59 + ? = 100
  26. 26.48 + ? = 100
  27. 27.34 + ? = 100
  28. 28.43 + ? = 100
  29. 29.89 + ? = 100
  30. 30.86 + ? = 100
  31. 31.56 + ? = 100
  32. 32.62 + ? = 100
  33. 33.25 + ? = 100
  34. 34.21 + ? = 100
  35. 35.7 + ? = 10
  36. 36.24 + ? = 100
  37. 37.80 + ? = 100
  38. 38.16 + ? = 100
  39. 39.31 + ? = 100
  40. 40.11 + ? = 100

Answer key

  1. 53
  2. 9
  3. 83
  4. 63
  5. 8
  6. 5
  7. 2
  8. 13
  9. 7
  10. 71
  11. 45
  12. 85
  13. 35
  14. 74
  15. 21
  16. 6
  17. 70
  18. 31
  19. 1
  20. 86
  21. 56
  22. 4
  23. 73
  24. 60
  25. 41
  26. 52
  27. 66
  28. 57
  29. 11
  30. 14
  31. 44
  32. 38
  33. 75
  34. 79
  35. 3
  36. 76
  37. 20
  38. 84
  39. 69
  40. 89

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