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Number Bonds Worksheet (to 10 and 100)

Mental maths lesson 1: Number bonds to 10 and 100 · Set 842 · 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. 1.19 + ? = 100
  2. 2.9 + ? = 10
  3. 3.4 + ? = 10
  4. 4.31 + ? = 100
  5. 5.6 + ? = 10
  6. 6.2 + ? = 10
  7. 7.12 + ? = 100
  8. 8.1 + ? = 10
  9. 9.23 + ? = 100
  10. 10.16 + ? = 100
  11. 11.76 + ? = 100
  12. 12.3 + ? = 10
  13. 13.32 + ? = 100
  14. 14.66 + ? = 100
  15. 15.51 + ? = 100
  16. 16.61 + ? = 100
  17. 17.5 + ? = 10
  18. 18.34 + ? = 100
  19. 19.7 + ? = 10
  20. 20.67 + ? = 100
  21. 21.38 + ? = 100
  22. 22.74 + ? = 100
  23. 23.41 + ? = 100
  24. 24.55 + ? = 100
  25. 25.25 + ? = 100
  26. 26.14 + ? = 100
  27. 27.82 + ? = 100
  28. 28.26 + ? = 100
  29. 29.15 + ? = 100
  30. 30.62 + ? = 100
  31. 31.72 + ? = 100
  32. 32.18 + ? = 100
  33. 33.39 + ? = 100
  34. 34.57 + ? = 100
  35. 35.35 + ? = 100
  36. 36.8 + ? = 10
  37. 37.17 + ? = 100
  38. 38.54 + ? = 100
  39. 39.49 + ? = 100
  40. 40.45 + ? = 100

Answer key

  1. 81
  2. 1
  3. 6
  4. 69
  5. 4
  6. 8
  7. 88
  8. 9
  9. 77
  10. 84
  11. 24
  12. 7
  13. 68
  14. 34
  15. 49
  16. 39
  17. 5
  18. 66
  19. 3
  20. 33
  21. 62
  22. 26
  23. 59
  24. 45
  25. 75
  26. 86
  27. 18
  28. 74
  29. 85
  30. 38
  31. 28
  32. 82
  33. 61
  34. 43
  35. 65
  36. 2
  37. 83
  38. 46
  39. 51
  40. 55

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