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Number Bonds Worksheet (to 10 and 100)

Mental maths lesson 1: Number bonds to 10 and 100 · Set 838 · 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. 1.4 + ? = 10
  2. 2.1 + ? = 10
  3. 3.9 + ? = 10
  4. 4.54 + ? = 100
  5. 5.62 + ? = 100
  6. 6.87 + ? = 100
  7. 7.89 + ? = 100
  8. 8.70 + ? = 100
  9. 9.55 + ? = 100
  10. 10.47 + ? = 100
  11. 11.12 + ? = 100
  12. 12.23 + ? = 100
  13. 13.86 + ? = 100
  14. 14.50 + ? = 100
  15. 15.28 + ? = 100
  16. 16.5 + ? = 10
  17. 17.3 + ? = 10
  18. 18.24 + ? = 100
  19. 19.2 + ? = 10
  20. 20.67 + ? = 100
  21. 21.7 + ? = 10
  22. 22.6 + ? = 10
  23. 23.65 + ? = 100
  24. 24.45 + ? = 100
  25. 25.25 + ? = 100
  26. 26.8 + ? = 10
  27. 27.64 + ? = 100
  28. 28.68 + ? = 100
  29. 29.40 + ? = 100
  30. 30.57 + ? = 100
  31. 31.61 + ? = 100
  32. 32.82 + ? = 100
  33. 33.22 + ? = 100
  34. 34.29 + ? = 100
  35. 35.17 + ? = 100
  36. 36.21 + ? = 100
  37. 37.18 + ? = 100
  38. 38.78 + ? = 100
  39. 39.42 + ? = 100
  40. 40.85 + ? = 100

Answer key

  1. 6
  2. 9
  3. 1
  4. 46
  5. 38
  6. 13
  7. 11
  8. 30
  9. 45
  10. 53
  11. 88
  12. 77
  13. 14
  14. 50
  15. 72
  16. 5
  17. 7
  18. 76
  19. 8
  20. 33
  21. 3
  22. 4
  23. 35
  24. 55
  25. 75
  26. 2
  27. 36
  28. 32
  29. 60
  30. 43
  31. 39
  32. 18
  33. 78
  34. 71
  35. 83
  36. 79
  37. 82
  38. 22
  39. 58
  40. 15

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