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Number Bonds Worksheet (to 10 and 100)

Mental maths lesson 1: Number bonds to 10 and 100 · Set 927 · 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. 1.4 + ? = 10
  2. 2.2 + ? = 10
  3. 3.3 + ? = 10
  4. 4.1 + ? = 10
  5. 5.57 + ? = 100
  6. 6.85 + ? = 100
  7. 7.53 + ? = 100
  8. 8.23 + ? = 100
  9. 9.15 + ? = 100
  10. 10.22 + ? = 100
  11. 11.8 + ? = 10
  12. 12.9 + ? = 10
  13. 13.45 + ? = 100
  14. 14.54 + ? = 100
  15. 15.7 + ? = 10
  16. 16.13 + ? = 100
  17. 17.16 + ? = 100
  18. 18.77 + ? = 100
  19. 19.47 + ? = 100
  20. 20.6 + ? = 10
  21. 21.36 + ? = 100
  22. 22.86 + ? = 100
  23. 23.83 + ? = 100
  24. 24.73 + ? = 100
  25. 25.88 + ? = 100
  26. 26.48 + ? = 100
  27. 27.64 + ? = 100
  28. 28.20 + ? = 100
  29. 29.67 + ? = 100
  30. 30.78 + ? = 100
  31. 31.5 + ? = 10
  32. 32.30 + ? = 100
  33. 33.17 + ? = 100
  34. 34.29 + ? = 100
  35. 35.8 + ? = 10
  36. 36.12 + ? = 100
  37. 37.87 + ? = 100
  38. 38.82 + ? = 100
  39. 39.71 + ? = 100
  40. 40.84 + ? = 100

Answer key

  1. 6
  2. 8
  3. 7
  4. 9
  5. 43
  6. 15
  7. 47
  8. 77
  9. 85
  10. 78
  11. 2
  12. 1
  13. 55
  14. 46
  15. 3
  16. 87
  17. 84
  18. 23
  19. 53
  20. 4
  21. 64
  22. 14
  23. 17
  24. 27
  25. 12
  26. 52
  27. 36
  28. 80
  29. 33
  30. 22
  31. 5
  32. 70
  33. 83
  34. 71
  35. 2
  36. 88
  37. 13
  38. 18
  39. 29
  40. 16

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