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Number Bonds Worksheet (to 10 and 100)

Mental maths lesson 1: Number bonds to 10 and 100 · Set 869 · 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. 1.9 + ? = 10
  2. 2.2 + ? = 10
  3. 3.20 + ? = 100
  4. 4.6 + ? = 10
  5. 5.63 + ? = 100
  6. 6.57 + ? = 100
  7. 7.4 + ? = 10
  8. 8.3 + ? = 10
  9. 9.21 + ? = 100
  10. 10.64 + ? = 100
  11. 11.17 + ? = 100
  12. 12.22 + ? = 100
  13. 13.24 + ? = 100
  14. 14.7 + ? = 10
  15. 15.81 + ? = 100
  16. 16.48 + ? = 100
  17. 17.46 + ? = 100
  18. 18.1 + ? = 10
  19. 19.74 + ? = 100
  20. 20.14 + ? = 100
  21. 21.5 + ? = 10
  22. 22.53 + ? = 100
  23. 23.87 + ? = 100
  24. 24.41 + ? = 100
  25. 25.77 + ? = 100
  26. 26.26 + ? = 100
  27. 27.83 + ? = 100
  28. 28.15 + ? = 100
  29. 29.23 + ? = 100
  30. 30.61 + ? = 100
  31. 31.11 + ? = 100
  32. 32.59 + ? = 100
  33. 33.8 + ? = 10
  34. 34.30 + ? = 100
  35. 35.47 + ? = 100
  36. 36.33 + ? = 100
  37. 37.86 + ? = 100
  38. 38.80 + ? = 100
  39. 39.60 + ? = 100
  40. 40.70 + ? = 100

Answer key

  1. 1
  2. 8
  3. 80
  4. 4
  5. 37
  6. 43
  7. 6
  8. 7
  9. 79
  10. 36
  11. 83
  12. 78
  13. 76
  14. 3
  15. 19
  16. 52
  17. 54
  18. 9
  19. 26
  20. 86
  21. 5
  22. 47
  23. 13
  24. 59
  25. 23
  26. 74
  27. 17
  28. 85
  29. 77
  30. 39
  31. 89
  32. 41
  33. 2
  34. 70
  35. 53
  36. 67
  37. 14
  38. 20
  39. 40
  40. 30

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