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Number Bonds Worksheet (to 10 and 100)

Mental maths lesson 1: Number bonds to 10 and 100 · Set 785 · 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. 1.8 + ? = 10
  2. 2.2 + ? = 10
  3. 3.48 + ? = 100
  4. 4.7 + ? = 10
  5. 5.5 + ? = 10
  6. 6.11 + ? = 100
  7. 7.9 + ? = 10
  8. 8.13 + ? = 100
  9. 9.4 + ? = 10
  10. 10.3 + ? = 10
  11. 11.33 + ? = 100
  12. 12.29 + ? = 100
  13. 13.73 + ? = 100
  14. 14.70 + ? = 100
  15. 15.75 + ? = 100
  16. 16.1 + ? = 10
  17. 17.21 + ? = 100
  18. 18.89 + ? = 100
  19. 19.30 + ? = 100
  20. 20.19 + ? = 100
  21. 21.32 + ? = 100
  22. 22.6 + ? = 10
  23. 23.51 + ? = 100
  24. 24.83 + ? = 100
  25. 25.58 + ? = 100
  26. 26.76 + ? = 100
  27. 27.79 + ? = 100
  28. 28.16 + ? = 100
  29. 29.41 + ? = 100
  30. 30.12 + ? = 100
  31. 31.18 + ? = 100
  32. 32.7 + ? = 10
  33. 33.61 + ? = 100
  34. 34.65 + ? = 100
  35. 35.66 + ? = 100
  36. 36.74 + ? = 100
  37. 37.50 + ? = 100
  38. 38.38 + ? = 100
  39. 39.88 + ? = 100
  40. 40.63 + ? = 100

Answer key

  1. 2
  2. 8
  3. 52
  4. 3
  5. 5
  6. 89
  7. 1
  8. 87
  9. 6
  10. 7
  11. 67
  12. 71
  13. 27
  14. 30
  15. 25
  16. 9
  17. 79
  18. 11
  19. 70
  20. 81
  21. 68
  22. 4
  23. 49
  24. 17
  25. 42
  26. 24
  27. 21
  28. 84
  29. 59
  30. 88
  31. 82
  32. 3
  33. 39
  34. 35
  35. 34
  36. 26
  37. 50
  38. 62
  39. 12
  40. 37

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