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Number Bonds Worksheet (to 10 and 100)

Mental maths lesson 1: Number bonds to 10 and 100 · Set 947 · 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. 1.39 + ? = 100
  2. 2.58 + ? = 100
  3. 3.5 + ? = 10
  4. 4.16 + ? = 100
  5. 5.4 + ? = 10
  6. 6.7 + ? = 10
  7. 7.73 + ? = 100
  8. 8.83 + ? = 100
  9. 9.2 + ? = 10
  10. 10.1 + ? = 10
  11. 11.85 + ? = 100
  12. 12.32 + ? = 100
  13. 13.8 + ? = 10
  14. 14.3 + ? = 10
  15. 15.13 + ? = 100
  16. 16.57 + ? = 100
  17. 17.12 + ? = 100
  18. 18.59 + ? = 100
  19. 19.79 + ? = 100
  20. 20.84 + ? = 100
  21. 21.9 + ? = 10
  22. 22.26 + ? = 100
  23. 23.34 + ? = 100
  24. 24.35 + ? = 100
  25. 25.62 + ? = 100
  26. 26.40 + ? = 100
  27. 27.72 + ? = 100
  28. 28.60 + ? = 100
  29. 29.15 + ? = 100
  30. 30.48 + ? = 100
  31. 31.69 + ? = 100
  32. 32.77 + ? = 100
  33. 33.6 + ? = 10
  34. 34.52 + ? = 100
  35. 35.43 + ? = 100
  36. 36.49 + ? = 100
  37. 37.41 + ? = 100
  38. 38.17 + ? = 100
  39. 39.23 + ? = 100
  40. 40.11 + ? = 100

Answer key

  1. 61
  2. 42
  3. 5
  4. 84
  5. 6
  6. 3
  7. 27
  8. 17
  9. 8
  10. 9
  11. 15
  12. 68
  13. 2
  14. 7
  15. 87
  16. 43
  17. 88
  18. 41
  19. 21
  20. 16
  21. 1
  22. 74
  23. 66
  24. 65
  25. 38
  26. 60
  27. 28
  28. 40
  29. 85
  30. 52
  31. 31
  32. 23
  33. 4
  34. 48
  35. 57
  36. 51
  37. 59
  38. 83
  39. 77
  40. 89

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