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Number Bonds Worksheet (to 10 and 100)

Mental maths lesson 1: Number bonds to 10 and 100 · Set 826 · 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. 1.40 + ? = 100
  2. 2.8 + ? = 10
  3. 3.57 + ? = 100
  4. 4.15 + ? = 100
  5. 5.4 + ? = 10
  6. 6.16 + ? = 100
  7. 7.76 + ? = 100
  8. 8.21 + ? = 100
  9. 9.7 + ? = 10
  10. 10.26 + ? = 100
  11. 11.1 + ? = 10
  12. 12.22 + ? = 100
  13. 13.73 + ? = 100
  14. 14.19 + ? = 100
  15. 15.51 + ? = 100
  16. 16.28 + ? = 100
  17. 17.43 + ? = 100
  18. 18.35 + ? = 100
  19. 19.49 + ? = 100
  20. 20.56 + ? = 100
  21. 21.3 + ? = 10
  22. 22.6 + ? = 10
  23. 23.63 + ? = 100
  24. 24.14 + ? = 100
  25. 25.25 + ? = 100
  26. 26.5 + ? = 10
  27. 27.46 + ? = 100
  28. 28.29 + ? = 100
  29. 29.55 + ? = 100
  30. 30.52 + ? = 100
  31. 31.9 + ? = 10
  32. 32.87 + ? = 100
  33. 33.13 + ? = 100
  34. 34.58 + ? = 100
  35. 35.33 + ? = 100
  36. 36.41 + ? = 100
  37. 37.59 + ? = 100
  38. 38.85 + ? = 100
  39. 39.65 + ? = 100
  40. 40.39 + ? = 100

Answer key

  1. 60
  2. 2
  3. 43
  4. 85
  5. 6
  6. 84
  7. 24
  8. 79
  9. 3
  10. 74
  11. 9
  12. 78
  13. 27
  14. 81
  15. 49
  16. 72
  17. 57
  18. 65
  19. 51
  20. 44
  21. 7
  22. 4
  23. 37
  24. 86
  25. 75
  26. 5
  27. 54
  28. 71
  29. 45
  30. 48
  31. 1
  32. 13
  33. 87
  34. 42
  35. 67
  36. 59
  37. 41
  38. 15
  39. 35
  40. 61

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