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Number Bonds Worksheet (to 10 and 100)

Mental maths lesson 1: Number bonds to 10 and 100 · Set 994 · 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. 1.15 + ? = 100
  2. 2.31 + ? = 100
  3. 3.6 + ? = 10
  4. 4.9 + ? = 10
  5. 5.40 + ? = 100
  6. 6.11 + ? = 100
  7. 7.7 + ? = 10
  8. 8.3 + ? = 10
  9. 9.60 + ? = 100
  10. 10.36 + ? = 100
  11. 11.76 + ? = 100
  12. 12.14 + ? = 100
  13. 13.1 + ? = 10
  14. 14.2 + ? = 10
  15. 15.4 + ? = 10
  16. 16.62 + ? = 100
  17. 17.5 + ? = 10
  18. 18.65 + ? = 100
  19. 19.83 + ? = 100
  20. 20.81 + ? = 100
  21. 21.35 + ? = 100
  22. 22.39 + ? = 100
  23. 23.89 + ? = 100
  24. 24.19 + ? = 100
  25. 25.32 + ? = 100
  26. 26.51 + ? = 100
  27. 27.21 + ? = 100
  28. 28.69 + ? = 100
  29. 29.67 + ? = 100
  30. 30.16 + ? = 100
  31. 31.25 + ? = 100
  32. 32.8 + ? = 10
  33. 33.37 + ? = 100
  34. 34.71 + ? = 100
  35. 35.29 + ? = 100
  36. 36.59 + ? = 100
  37. 37.61 + ? = 100
  38. 38.22 + ? = 100
  39. 39.23 + ? = 100
  40. 40.58 + ? = 100

Answer key

  1. 85
  2. 69
  3. 4
  4. 1
  5. 60
  6. 89
  7. 3
  8. 7
  9. 40
  10. 64
  11. 24
  12. 86
  13. 9
  14. 8
  15. 6
  16. 38
  17. 5
  18. 35
  19. 17
  20. 19
  21. 65
  22. 61
  23. 11
  24. 81
  25. 68
  26. 49
  27. 79
  28. 31
  29. 33
  30. 84
  31. 75
  32. 2
  33. 63
  34. 29
  35. 71
  36. 41
  37. 39
  38. 78
  39. 77
  40. 42

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