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Number Bonds Worksheet (to 10 and 100)

Mental maths lesson 1: Number bonds to 10 and 100 · Set 895 · 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. 1.72 + ? = 100
  2. 2.5 + ? = 10
  3. 3.62 + ? = 100
  4. 4.79 + ? = 100
  5. 5.39 + ? = 100
  6. 6.9 + ? = 10
  7. 7.54 + ? = 100
  8. 8.8 + ? = 10
  9. 9.1 + ? = 10
  10. 10.6 + ? = 10
  11. 11.37 + ? = 100
  12. 12.66 + ? = 100
  13. 13.2 + ? = 10
  14. 14.86 + ? = 100
  15. 15.13 + ? = 100
  16. 16.21 + ? = 100
  17. 17.7 + ? = 10
  18. 18.43 + ? = 100
  19. 19.53 + ? = 100
  20. 20.46 + ? = 100
  21. 21.4 + ? = 10
  22. 22.87 + ? = 100
  23. 23.12 + ? = 100
  24. 24.55 + ? = 100
  25. 25.34 + ? = 100
  26. 26.3 + ? = 10
  27. 27.33 + ? = 100
  28. 28.36 + ? = 100
  29. 29.18 + ? = 100
  30. 30.49 + ? = 100
  31. 31.20 + ? = 100
  32. 32.58 + ? = 100
  33. 33.26 + ? = 100
  34. 34.77 + ? = 100
  35. 35.89 + ? = 100
  36. 36.83 + ? = 100
  37. 37.52 + ? = 100
  38. 38.63 + ? = 100
  39. 39.48 + ? = 100
  40. 40.76 + ? = 100

Answer key

  1. 28
  2. 5
  3. 38
  4. 21
  5. 61
  6. 1
  7. 46
  8. 2
  9. 9
  10. 4
  11. 63
  12. 34
  13. 8
  14. 14
  15. 87
  16. 79
  17. 3
  18. 57
  19. 47
  20. 54
  21. 6
  22. 13
  23. 88
  24. 45
  25. 66
  26. 7
  27. 67
  28. 64
  29. 82
  30. 51
  31. 80
  32. 42
  33. 74
  34. 23
  35. 11
  36. 17
  37. 48
  38. 37
  39. 52
  40. 24

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