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Number Bonds Worksheet (to 10 and 100)

Mental maths lesson 1: Number bonds to 10 and 100 · Set 858 · 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. 1.86 + ? = 100
  2. 2.4 + ? = 10
  3. 3.9 + ? = 10
  4. 4.23 + ? = 100
  5. 5.33 + ? = 100
  6. 6.16 + ? = 100
  7. 7.18 + ? = 100
  8. 8.26 + ? = 100
  9. 9.28 + ? = 100
  10. 10.1 + ? = 10
  11. 11.53 + ? = 100
  12. 12.2 + ? = 10
  13. 13.6 + ? = 10
  14. 14.15 + ? = 100
  15. 15.45 + ? = 100
  16. 16.41 + ? = 100
  17. 17.72 + ? = 100
  18. 18.3 + ? = 10
  19. 19.46 + ? = 100
  20. 20.82 + ? = 100
  21. 21.7 + ? = 10
  22. 22.58 + ? = 100
  23. 23.63 + ? = 100
  24. 24.80 + ? = 100
  25. 25.59 + ? = 100
  26. 26.57 + ? = 100
  27. 27.65 + ? = 100
  28. 28.40 + ? = 100
  29. 29.42 + ? = 100
  30. 30.31 + ? = 100
  31. 31.44 + ? = 100
  32. 32.14 + ? = 100
  33. 33.61 + ? = 100
  34. 34.8 + ? = 10
  35. 35.5 + ? = 10
  36. 36.70 + ? = 100
  37. 37.22 + ? = 100
  38. 38.17 + ? = 100
  39. 39.29 + ? = 100
  40. 40.85 + ? = 100

Answer key

  1. 14
  2. 6
  3. 1
  4. 77
  5. 67
  6. 84
  7. 82
  8. 74
  9. 72
  10. 9
  11. 47
  12. 8
  13. 4
  14. 85
  15. 55
  16. 59
  17. 28
  18. 7
  19. 54
  20. 18
  21. 3
  22. 42
  23. 37
  24. 20
  25. 41
  26. 43
  27. 35
  28. 60
  29. 58
  30. 69
  31. 56
  32. 86
  33. 39
  34. 2
  35. 5
  36. 30
  37. 78
  38. 83
  39. 71
  40. 15

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