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Number Bonds Worksheet (to 10 and 100)

Mental maths lesson 1: Number bonds to 10 and 100 · Set 886 · 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. 2.12 + ? = 100
  3. 3.9 + ? = 10
  4. 4.58 + ? = 100
  5. 5.40 + ? = 100
  6. 6.55 + ? = 100
  7. 7.23 + ? = 100
  8. 8.33 + ? = 100
  9. 9.4 + ? = 10
  10. 10.79 + ? = 100
  11. 11.1 + ? = 10
  12. 12.61 + ? = 100
  13. 13.53 + ? = 100
  14. 14.86 + ? = 100
  15. 15.2 + ? = 10
  16. 16.8 + ? = 10
  17. 17.19 + ? = 100
  18. 18.37 + ? = 100
  19. 19.5 + ? = 10
  20. 20.25 + ? = 100
  21. 21.3 + ? = 10
  22. 22.15 + ? = 100
  23. 23.49 + ? = 100
  24. 24.60 + ? = 100
  25. 25.73 + ? = 100
  26. 26.29 + ? = 100
  27. 27.43 + ? = 100
  28. 28.27 + ? = 100
  29. 29.30 + ? = 100
  30. 30.42 + ? = 100
  31. 31.68 + ? = 100
  32. 32.7 + ? = 10
  33. 33.82 + ? = 100
  34. 34.75 + ? = 100
  35. 35.62 + ? = 100
  36. 36.70 + ? = 100
  37. 37.24 + ? = 100
  38. 38.69 + ? = 100
  39. 39.85 + ? = 100
  40. 40.57 + ? = 100

Answer key

  1. 4
  2. 88
  3. 1
  4. 42
  5. 60
  6. 45
  7. 77
  8. 67
  9. 6
  10. 21
  11. 9
  12. 39
  13. 47
  14. 14
  15. 8
  16. 2
  17. 81
  18. 63
  19. 5
  20. 75
  21. 7
  22. 85
  23. 51
  24. 40
  25. 27
  26. 71
  27. 57
  28. 73
  29. 70
  30. 58
  31. 32
  32. 3
  33. 18
  34. 25
  35. 38
  36. 30
  37. 76
  38. 31
  39. 15
  40. 43

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