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Number Bonds Worksheet (to 10 and 100)

Mental maths lesson 1: Number bonds to 10 and 100 · Set 803 · 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. 1.17 + ? = 100
  2. 2.60 + ? = 100
  3. 3.30 + ? = 100
  4. 4.80 + ? = 100
  5. 5.22 + ? = 100
  6. 6.84 + ? = 100
  7. 7.1 + ? = 10
  8. 8.78 + ? = 100
  9. 9.36 + ? = 100
  10. 10.35 + ? = 100
  11. 11.51 + ? = 100
  12. 12.2 + ? = 10
  13. 13.28 + ? = 100
  14. 14.4 + ? = 10
  15. 15.71 + ? = 100
  16. 16.38 + ? = 100
  17. 17.56 + ? = 100
  18. 18.68 + ? = 100
  19. 19.29 + ? = 100
  20. 20.43 + ? = 100
  21. 21.81 + ? = 100
  22. 22.6 + ? = 10
  23. 23.9 + ? = 10
  24. 24.65 + ? = 100
  25. 25.73 + ? = 100
  26. 26.7 + ? = 10
  27. 27.27 + ? = 100
  28. 28.46 + ? = 100
  29. 29.8 + ? = 10
  30. 30.5 + ? = 10
  31. 31.85 + ? = 100
  32. 32.3 + ? = 10
  33. 33.77 + ? = 100
  34. 34.72 + ? = 100
  35. 35.66 + ? = 100
  36. 36.88 + ? = 100
  37. 37.57 + ? = 100
  38. 38.55 + ? = 100
  39. 39.69 + ? = 100
  40. 40.14 + ? = 100

Answer key

  1. 83
  2. 40
  3. 70
  4. 20
  5. 78
  6. 16
  7. 9
  8. 22
  9. 64
  10. 65
  11. 49
  12. 8
  13. 72
  14. 6
  15. 29
  16. 62
  17. 44
  18. 32
  19. 71
  20. 57
  21. 19
  22. 4
  23. 1
  24. 35
  25. 27
  26. 3
  27. 73
  28. 54
  29. 2
  30. 5
  31. 15
  32. 7
  33. 23
  34. 28
  35. 34
  36. 12
  37. 43
  38. 45
  39. 31
  40. 86

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