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Number Bonds Worksheet (to 10 and 100)

Mental maths lesson 1: Number bonds to 10 and 100 · Set 796 · 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. 1.54 + ? = 100
  2. 2.3 + ? = 10
  3. 3.9 + ? = 10
  4. 4.71 + ? = 100
  5. 5.7 + ? = 10
  6. 6.5 + ? = 10
  7. 7.49 + ? = 100
  8. 8.66 + ? = 100
  9. 9.61 + ? = 100
  10. 10.1 + ? = 10
  11. 11.29 + ? = 100
  12. 12.85 + ? = 100
  13. 13.75 + ? = 100
  14. 14.33 + ? = 100
  15. 15.39 + ? = 100
  16. 16.37 + ? = 100
  17. 17.38 + ? = 100
  18. 18.51 + ? = 100
  19. 19.2 + ? = 10
  20. 20.40 + ? = 100
  21. 21.45 + ? = 100
  22. 22.58 + ? = 100
  23. 23.6 + ? = 10
  24. 24.15 + ? = 100
  25. 25.36 + ? = 100
  26. 26.89 + ? = 100
  27. 27.32 + ? = 100
  28. 28.12 + ? = 100
  29. 29.34 + ? = 100
  30. 30.23 + ? = 100
  31. 31.31 + ? = 100
  32. 32.63 + ? = 100
  33. 33.4 + ? = 10
  34. 34.64 + ? = 100
  35. 35.87 + ? = 100
  36. 36.28 + ? = 100
  37. 37.76 + ? = 100
  38. 38.8 + ? = 10
  39. 39.81 + ? = 100
  40. 40.52 + ? = 100

Answer key

  1. 46
  2. 7
  3. 1
  4. 29
  5. 3
  6. 5
  7. 51
  8. 34
  9. 39
  10. 9
  11. 71
  12. 15
  13. 25
  14. 67
  15. 61
  16. 63
  17. 62
  18. 49
  19. 8
  20. 60
  21. 55
  22. 42
  23. 4
  24. 85
  25. 64
  26. 11
  27. 68
  28. 88
  29. 66
  30. 77
  31. 69
  32. 37
  33. 6
  34. 36
  35. 13
  36. 72
  37. 24
  38. 2
  39. 19
  40. 48

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