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Number Bonds Worksheet (to 10 and 100)

Mental maths lesson 1: Number bonds to 10 and 100 · Set 938 · 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. 1.50 + ? = 100
  2. 2.59 + ? = 100
  3. 3.1 + ? = 10
  4. 4.2 + ? = 10
  5. 5.29 + ? = 100
  6. 6.5 + ? = 10
  7. 7.31 + ? = 100
  8. 8.34 + ? = 100
  9. 9.4 + ? = 10
  10. 10.20 + ? = 100
  11. 11.81 + ? = 100
  12. 12.87 + ? = 100
  13. 13.75 + ? = 100
  14. 14.12 + ? = 100
  15. 15.8 + ? = 10
  16. 16.60 + ? = 100
  17. 17.3 + ? = 10
  18. 18.62 + ? = 100
  19. 19.72 + ? = 100
  20. 20.21 + ? = 100
  21. 21.28 + ? = 100
  22. 22.47 + ? = 100
  23. 23.13 + ? = 100
  24. 24.76 + ? = 100
  25. 25.7 + ? = 10
  26. 26.9 + ? = 10
  27. 27.70 + ? = 100
  28. 28.44 + ? = 100
  29. 29.39 + ? = 100
  30. 30.42 + ? = 100
  31. 31.14 + ? = 100
  32. 32.74 + ? = 100
  33. 33.85 + ? = 100
  34. 34.78 + ? = 100
  35. 35.69 + ? = 100
  36. 36.67 + ? = 100
  37. 37.37 + ? = 100
  38. 38.33 + ? = 100
  39. 39.89 + ? = 100
  40. 40.26 + ? = 100

Answer key

  1. 50
  2. 41
  3. 9
  4. 8
  5. 71
  6. 5
  7. 69
  8. 66
  9. 6
  10. 80
  11. 19
  12. 13
  13. 25
  14. 88
  15. 2
  16. 40
  17. 7
  18. 38
  19. 28
  20. 79
  21. 72
  22. 53
  23. 87
  24. 24
  25. 3
  26. 1
  27. 30
  28. 56
  29. 61
  30. 58
  31. 86
  32. 26
  33. 15
  34. 22
  35. 31
  36. 33
  37. 63
  38. 67
  39. 11
  40. 74

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