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Number Bonds Worksheet (to 10 and 100)

Mental maths lesson 1: Number bonds to 10 and 100 · Set 956 · 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. 1.5 + ? = 10
  2. 2.46 + ? = 100
  3. 3.18 + ? = 100
  4. 4.3 + ? = 10
  5. 5.22 + ? = 100
  6. 6.39 + ? = 100
  7. 7.68 + ? = 100
  8. 8.2 + ? = 10
  9. 9.8 + ? = 10
  10. 10.50 + ? = 100
  11. 11.32 + ? = 100
  12. 12.60 + ? = 100
  13. 13.21 + ? = 100
  14. 14.6 + ? = 10
  15. 15.26 + ? = 100
  16. 16.9 + ? = 10
  17. 17.44 + ? = 100
  18. 18.17 + ? = 100
  19. 19.55 + ? = 100
  20. 20.1 + ? = 10
  21. 21.24 + ? = 100
  22. 22.4 + ? = 10
  23. 23.14 + ? = 100
  24. 24.20 + ? = 100
  25. 25.7 + ? = 10
  26. 26.38 + ? = 100
  27. 27.34 + ? = 100
  28. 28.64 + ? = 100
  29. 29.61 + ? = 100
  30. 30.16 + ? = 100
  31. 31.49 + ? = 100
  32. 32.66 + ? = 100
  33. 33.65 + ? = 100
  34. 34.52 + ? = 100
  35. 35.33 + ? = 100
  36. 36.13 + ? = 100
  37. 37.71 + ? = 100
  38. 38.78 + ? = 100
  39. 39.57 + ? = 100
  40. 40.47 + ? = 100

Answer key

  1. 5
  2. 54
  3. 82
  4. 7
  5. 78
  6. 61
  7. 32
  8. 8
  9. 2
  10. 50
  11. 68
  12. 40
  13. 79
  14. 4
  15. 74
  16. 1
  17. 56
  18. 83
  19. 45
  20. 9
  21. 76
  22. 6
  23. 86
  24. 80
  25. 3
  26. 62
  27. 66
  28. 36
  29. 39
  30. 84
  31. 51
  32. 34
  33. 35
  34. 48
  35. 67
  36. 87
  37. 29
  38. 22
  39. 43
  40. 53

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