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Number Bonds Worksheet (to 10 and 100)

Mental maths lesson 1: Number bonds to 10 and 100 · Set 935 · 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. 1.7 + ? = 10
  2. 2.9 + ? = 10
  3. 3.26 + ? = 100
  4. 4.3 + ? = 10
  5. 5.6 + ? = 10
  6. 6.8 + ? = 10
  7. 7.1 + ? = 10
  8. 8.19 + ? = 100
  9. 9.2 + ? = 10
  10. 10.82 + ? = 100
  11. 11.40 + ? = 100
  12. 12.41 + ? = 100
  13. 13.16 + ? = 100
  14. 14.4 + ? = 10
  15. 15.22 + ? = 100
  16. 16.39 + ? = 100
  17. 17.18 + ? = 100
  18. 18.59 + ? = 100
  19. 19.77 + ? = 100
  20. 20.69 + ? = 100
  21. 21.17 + ? = 100
  22. 22.72 + ? = 100
  23. 23.51 + ? = 100
  24. 24.21 + ? = 100
  25. 25.33 + ? = 100
  26. 26.60 + ? = 100
  27. 27.71 + ? = 100
  28. 28.73 + ? = 100
  29. 29.65 + ? = 100
  30. 30.88 + ? = 100
  31. 31.50 + ? = 100
  32. 32.30 + ? = 100
  33. 33.44 + ? = 100
  34. 34.55 + ? = 100
  35. 35.29 + ? = 100
  36. 36.12 + ? = 100
  37. 37.34 + ? = 100
  38. 38.28 + ? = 100
  39. 39.5 + ? = 10
  40. 40.47 + ? = 100

Answer key

  1. 3
  2. 1
  3. 74
  4. 7
  5. 4
  6. 2
  7. 9
  8. 81
  9. 8
  10. 18
  11. 60
  12. 59
  13. 84
  14. 6
  15. 78
  16. 61
  17. 82
  18. 41
  19. 23
  20. 31
  21. 83
  22. 28
  23. 49
  24. 79
  25. 67
  26. 40
  27. 29
  28. 27
  29. 35
  30. 12
  31. 50
  32. 70
  33. 56
  34. 45
  35. 71
  36. 88
  37. 66
  38. 72
  39. 5
  40. 53

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