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Number Bonds Worksheet (to 10 and 100)

Mental maths lesson 1: Number bonds to 10 and 100 · Set 776 · 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. 1.6 + ? = 10
  2. 2.44 + ? = 100
  3. 3.2 + ? = 10
  4. 4.7 + ? = 10
  5. 5.80 + ? = 100
  6. 6.9 + ? = 10
  7. 7.69 + ? = 100
  8. 8.4 + ? = 10
  9. 9.5 + ? = 10
  10. 10.34 + ? = 100
  11. 11.37 + ? = 100
  12. 12.84 + ? = 100
  13. 13.8 + ? = 10
  14. 14.79 + ? = 100
  15. 15.35 + ? = 100
  16. 16.66 + ? = 100
  17. 17.86 + ? = 100
  18. 18.61 + ? = 100
  19. 19.77 + ? = 100
  20. 20.71 + ? = 100
  21. 21.3 + ? = 10
  22. 22.40 + ? = 100
  23. 23.68 + ? = 100
  24. 24.1 + ? = 10
  25. 25.30 + ? = 100
  26. 26.76 + ? = 100
  27. 27.25 + ? = 100
  28. 28.41 + ? = 100
  29. 29.62 + ? = 100
  30. 30.29 + ? = 100
  31. 31.32 + ? = 100
  32. 32.48 + ? = 100
  33. 33.22 + ? = 100
  34. 34.38 + ? = 100
  35. 35.59 + ? = 100
  36. 36.78 + ? = 100
  37. 37.42 + ? = 100
  38. 38.13 + ? = 100
  39. 39.83 + ? = 100
  40. 40.88 + ? = 100

Answer key

  1. 4
  2. 56
  3. 8
  4. 3
  5. 20
  6. 1
  7. 31
  8. 6
  9. 5
  10. 66
  11. 63
  12. 16
  13. 2
  14. 21
  15. 65
  16. 34
  17. 14
  18. 39
  19. 23
  20. 29
  21. 7
  22. 60
  23. 32
  24. 9
  25. 70
  26. 24
  27. 75
  28. 59
  29. 38
  30. 71
  31. 68
  32. 52
  33. 78
  34. 62
  35. 41
  36. 22
  37. 58
  38. 87
  39. 17
  40. 12

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