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Number Bonds Worksheet (to 10 and 100)

Mental maths lesson 1: Number bonds to 10 and 100 · Set 892 · 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. 1.6 + ? = 10
  2. 2.43 + ? = 100
  3. 3.29 + ? = 100
  4. 4.24 + ? = 100
  5. 5.13 + ? = 100
  6. 6.46 + ? = 100
  7. 7.5 + ? = 10
  8. 8.20 + ? = 100
  9. 9.38 + ? = 100
  10. 10.7 + ? = 10
  11. 11.1 + ? = 10
  12. 12.52 + ? = 100
  13. 13.26 + ? = 100
  14. 14.33 + ? = 100
  15. 15.2 + ? = 10
  16. 16.19 + ? = 100
  17. 17.3 + ? = 10
  18. 18.28 + ? = 100
  19. 19.63 + ? = 100
  20. 20.50 + ? = 100
  21. 21.79 + ? = 100
  22. 22.55 + ? = 100
  23. 23.57 + ? = 100
  24. 24.48 + ? = 100
  25. 25.9 + ? = 10
  26. 26.68 + ? = 100
  27. 27.80 + ? = 100
  28. 28.4 + ? = 10
  29. 29.8 + ? = 10
  30. 30.35 + ? = 100
  31. 31.65 + ? = 100
  32. 32.49 + ? = 100
  33. 33.30 + ? = 100
  34. 34.89 + ? = 100
  35. 35.64 + ? = 100
  36. 36.17 + ? = 100
  37. 37.32 + ? = 100
  38. 38.87 + ? = 100
  39. 39.25 + ? = 100
  40. 40.27 + ? = 100

Answer key

  1. 4
  2. 57
  3. 71
  4. 76
  5. 87
  6. 54
  7. 5
  8. 80
  9. 62
  10. 3
  11. 9
  12. 48
  13. 74
  14. 67
  15. 8
  16. 81
  17. 7
  18. 72
  19. 37
  20. 50
  21. 21
  22. 45
  23. 43
  24. 52
  25. 1
  26. 32
  27. 20
  28. 6
  29. 2
  30. 65
  31. 35
  32. 51
  33. 70
  34. 11
  35. 36
  36. 83
  37. 68
  38. 13
  39. 75
  40. 73

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