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Number Bonds Worksheet (to 10 and 100)

Mental maths lesson 1: Number bonds to 10 and 100 · Set 731 · 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. 1.2 + ? = 10
  2. 2.81 + ? = 100
  3. 3.9 + ? = 10
  4. 4.32 + ? = 100
  5. 5.7 + ? = 10
  6. 6.45 + ? = 100
  7. 7.26 + ? = 100
  8. 8.50 + ? = 100
  9. 9.25 + ? = 100
  10. 10.30 + ? = 100
  11. 11.52 + ? = 100
  12. 12.4 + ? = 10
  13. 13.31 + ? = 100
  14. 14.78 + ? = 100
  15. 15.3 + ? = 10
  16. 16.56 + ? = 100
  17. 17.5 + ? = 10
  18. 18.86 + ? = 100
  19. 19.15 + ? = 100
  20. 20.1 + ? = 10
  21. 21.19 + ? = 100
  22. 22.51 + ? = 100
  23. 23.14 + ? = 100
  24. 24.73 + ? = 100
  25. 25.82 + ? = 100
  26. 26.16 + ? = 100
  27. 27.6 + ? = 10
  28. 28.43 + ? = 100
  29. 29.76 + ? = 100
  30. 30.38 + ? = 100
  31. 31.68 + ? = 100
  32. 32.55 + ? = 100
  33. 33.61 + ? = 100
  34. 34.40 + ? = 100
  35. 35.66 + ? = 100
  36. 36.41 + ? = 100
  37. 37.74 + ? = 100
  38. 38.37 + ? = 100
  39. 39.85 + ? = 100
  40. 40.11 + ? = 100

Answer key

  1. 8
  2. 19
  3. 1
  4. 68
  5. 3
  6. 55
  7. 74
  8. 50
  9. 75
  10. 70
  11. 48
  12. 6
  13. 69
  14. 22
  15. 7
  16. 44
  17. 5
  18. 14
  19. 85
  20. 9
  21. 81
  22. 49
  23. 86
  24. 27
  25. 18
  26. 84
  27. 4
  28. 57
  29. 24
  30. 62
  31. 32
  32. 45
  33. 39
  34. 60
  35. 34
  36. 59
  37. 26
  38. 63
  39. 15
  40. 89

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