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Number Bonds Worksheet (to 10 and 100)

Mental maths lesson 1: Number bonds to 10 and 100 · Set 885 · 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. 1.8 + ? = 10
  2. 2.81 + ? = 100
  3. 3.2 + ? = 10
  4. 4.9 + ? = 10
  5. 5.45 + ? = 100
  6. 6.27 + ? = 100
  7. 7.16 + ? = 100
  8. 8.76 + ? = 100
  9. 9.23 + ? = 100
  10. 10.33 + ? = 100
  11. 11.3 + ? = 10
  12. 12.17 + ? = 100
  13. 13.38 + ? = 100
  14. 14.68 + ? = 100
  15. 15.4 + ? = 10
  16. 16.11 + ? = 100
  17. 17.7 + ? = 10
  18. 18.36 + ? = 100
  19. 19.85 + ? = 100
  20. 20.73 + ? = 100
  21. 21.13 + ? = 100
  22. 22.34 + ? = 100
  23. 23.19 + ? = 100
  24. 24.1 + ? = 10
  25. 25.84 + ? = 100
  26. 26.77 + ? = 100
  27. 27.56 + ? = 100
  28. 28.79 + ? = 100
  29. 29.61 + ? = 100
  30. 30.5 + ? = 10
  31. 31.66 + ? = 100
  32. 32.63 + ? = 100
  33. 33.14 + ? = 100
  34. 34.30 + ? = 100
  35. 35.51 + ? = 100
  36. 36.32 + ? = 100
  37. 37.70 + ? = 100
  38. 38.64 + ? = 100
  39. 39.69 + ? = 100
  40. 40.29 + ? = 100

Answer key

  1. 2
  2. 19
  3. 8
  4. 1
  5. 55
  6. 73
  7. 84
  8. 24
  9. 77
  10. 67
  11. 7
  12. 83
  13. 62
  14. 32
  15. 6
  16. 89
  17. 3
  18. 64
  19. 15
  20. 27
  21. 87
  22. 66
  23. 81
  24. 9
  25. 16
  26. 23
  27. 44
  28. 21
  29. 39
  30. 5
  31. 34
  32. 37
  33. 86
  34. 70
  35. 49
  36. 68
  37. 30
  38. 36
  39. 31
  40. 71

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