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Number Bonds Worksheet (to 10 and 100)

Mental maths lesson 1: Number bonds to 10 and 100 · Set 746 · 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. 1.5 + ? = 10
  2. 2.23 + ? = 100
  3. 3.58 + ? = 100
  4. 4.17 + ? = 100
  5. 5.9 + ? = 10
  6. 6.51 + ? = 100
  7. 7.4 + ? = 10
  8. 8.26 + ? = 100
  9. 9.73 + ? = 100
  10. 10.7 + ? = 10
  11. 11.20 + ? = 100
  12. 12.56 + ? = 100
  13. 13.69 + ? = 100
  14. 14.1 + ? = 10
  15. 15.34 + ? = 100
  16. 16.8 + ? = 10
  17. 17.27 + ? = 100
  18. 18.6 + ? = 10
  19. 19.41 + ? = 100
  20. 20.3 + ? = 10
  21. 21.42 + ? = 100
  22. 22.11 + ? = 100
  23. 23.35 + ? = 100
  24. 24.13 + ? = 100
  25. 25.88 + ? = 100
  26. 26.2 + ? = 10
  27. 27.43 + ? = 100
  28. 28.24 + ? = 100
  29. 29.37 + ? = 100
  30. 30.33 + ? = 100
  31. 31.84 + ? = 100
  32. 32.30 + ? = 100
  33. 33.89 + ? = 100
  34. 34.63 + ? = 100
  35. 35.61 + ? = 100
  36. 36.19 + ? = 100
  37. 37.22 + ? = 100
  38. 38.48 + ? = 100
  39. 39.38 + ? = 100
  40. 40.53 + ? = 100

Answer key

  1. 5
  2. 77
  3. 42
  4. 83
  5. 1
  6. 49
  7. 6
  8. 74
  9. 27
  10. 3
  11. 80
  12. 44
  13. 31
  14. 9
  15. 66
  16. 2
  17. 73
  18. 4
  19. 59
  20. 7
  21. 58
  22. 89
  23. 65
  24. 87
  25. 12
  26. 8
  27. 57
  28. 76
  29. 63
  30. 67
  31. 16
  32. 70
  33. 11
  34. 37
  35. 39
  36. 81
  37. 78
  38. 52
  39. 62
  40. 47

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