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Number Bonds Worksheet (to 10 and 100)

Mental maths lesson 1: Number bonds to 10 and 100 · Set 880 · 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. 2.9 + ? = 10
  3. 3.5 + ? = 10
  4. 4.32 + ? = 100
  5. 5.26 + ? = 100
  6. 6.69 + ? = 100
  7. 7.42 + ? = 100
  8. 8.1 + ? = 10
  9. 9.4 + ? = 10
  10. 10.59 + ? = 100
  11. 11.44 + ? = 100
  12. 12.19 + ? = 100
  13. 13.49 + ? = 100
  14. 14.72 + ? = 100
  15. 15.36 + ? = 100
  16. 16.22 + ? = 100
  17. 17.3 + ? = 10
  18. 18.84 + ? = 100
  19. 19.58 + ? = 100
  20. 20.6 + ? = 10
  21. 21.2 + ? = 10
  22. 22.31 + ? = 100
  23. 23.61 + ? = 100
  24. 24.39 + ? = 100
  25. 25.52 + ? = 100
  26. 26.37 + ? = 100
  27. 27.85 + ? = 100
  28. 28.7 + ? = 10
  29. 29.14 + ? = 100
  30. 30.29 + ? = 100
  31. 31.54 + ? = 100
  32. 32.48 + ? = 100
  33. 33.34 + ? = 100
  34. 34.18 + ? = 100
  35. 35.75 + ? = 100
  36. 36.28 + ? = 100
  37. 37.55 + ? = 100
  38. 38.86 + ? = 100
  39. 39.73 + ? = 100
  40. 40.83 + ? = 100

Answer key

  1. 2
  2. 1
  3. 5
  4. 68
  5. 74
  6. 31
  7. 58
  8. 9
  9. 6
  10. 41
  11. 56
  12. 81
  13. 51
  14. 28
  15. 64
  16. 78
  17. 7
  18. 16
  19. 42
  20. 4
  21. 8
  22. 69
  23. 39
  24. 61
  25. 48
  26. 63
  27. 15
  28. 3
  29. 86
  30. 71
  31. 46
  32. 52
  33. 66
  34. 82
  35. 25
  36. 72
  37. 45
  38. 14
  39. 27
  40. 17

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