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Number Bonds Worksheet (to 10 and 100)

Mental maths lesson 1: Number bonds to 10 and 100 · Set 808 · 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. 1.42 + ? = 100
  2. 2.3 + ? = 10
  3. 3.4 + ? = 10
  4. 4.8 + ? = 10
  5. 5.18 + ? = 100
  6. 6.60 + ? = 100
  7. 7.14 + ? = 100
  8. 8.54 + ? = 100
  9. 9.71 + ? = 100
  10. 10.45 + ? = 100
  11. 11.58 + ? = 100
  12. 12.80 + ? = 100
  13. 13.7 + ? = 10
  14. 14.32 + ? = 100
  15. 15.21 + ? = 100
  16. 16.9 + ? = 10
  17. 17.68 + ? = 100
  18. 18.79 + ? = 100
  19. 19.83 + ? = 100
  20. 20.31 + ? = 100
  21. 21.17 + ? = 100
  22. 22.61 + ? = 100
  23. 23.73 + ? = 100
  24. 24.1 + ? = 10
  25. 25.29 + ? = 100
  26. 26.26 + ? = 100
  27. 27.65 + ? = 100
  28. 28.49 + ? = 100
  29. 29.75 + ? = 100
  30. 30.6 + ? = 10
  31. 31.2 + ? = 10
  32. 32.28 + ? = 100
  33. 33.62 + ? = 100
  34. 34.86 + ? = 100
  35. 35.44 + ? = 100
  36. 36.5 + ? = 10
  37. 37.63 + ? = 100
  38. 38.76 + ? = 100
  39. 39.34 + ? = 100
  40. 40.38 + ? = 100

Answer key

  1. 58
  2. 7
  3. 6
  4. 2
  5. 82
  6. 40
  7. 86
  8. 46
  9. 29
  10. 55
  11. 42
  12. 20
  13. 3
  14. 68
  15. 79
  16. 1
  17. 32
  18. 21
  19. 17
  20. 69
  21. 83
  22. 39
  23. 27
  24. 9
  25. 71
  26. 74
  27. 35
  28. 51
  29. 25
  30. 4
  31. 8
  32. 72
  33. 38
  34. 14
  35. 56
  36. 5
  37. 37
  38. 24
  39. 66
  40. 62

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