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Number Bonds Worksheet (to 10 and 100)

Mental maths lesson 1: Number bonds to 10 and 100 · Set 730 · 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. 1.2 + ? = 10
  2. 2.49 + ? = 100
  3. 3.75 + ? = 100
  4. 4.5 + ? = 10
  5. 5.3 + ? = 10
  6. 6.24 + ? = 100
  7. 7.89 + ? = 100
  8. 8.41 + ? = 100
  9. 9.7 + ? = 10
  10. 10.4 + ? = 10
  11. 11.13 + ? = 100
  12. 12.28 + ? = 100
  13. 13.19 + ? = 100
  14. 14.87 + ? = 100
  15. 15.9 + ? = 10
  16. 16.1 + ? = 10
  17. 17.25 + ? = 100
  18. 18.46 + ? = 100
  19. 19.6 + ? = 10
  20. 20.8 + ? = 10
  21. 21.23 + ? = 100
  22. 22.56 + ? = 100
  23. 23.12 + ? = 100
  24. 24.68 + ? = 100
  25. 25.29 + ? = 100
  26. 26.80 + ? = 100
  27. 27.63 + ? = 100
  28. 28.79 + ? = 100
  29. 29.16 + ? = 100
  30. 30.55 + ? = 100
  31. 31.21 + ? = 100
  32. 32.86 + ? = 100
  33. 33.15 + ? = 100
  34. 34.17 + ? = 100
  35. 35.52 + ? = 100
  36. 36.64 + ? = 100
  37. 37.35 + ? = 100
  38. 38.27 + ? = 100
  39. 39.50 + ? = 100
  40. 40.51 + ? = 100

Answer key

  1. 8
  2. 51
  3. 25
  4. 5
  5. 7
  6. 76
  7. 11
  8. 59
  9. 3
  10. 6
  11. 87
  12. 72
  13. 81
  14. 13
  15. 1
  16. 9
  17. 75
  18. 54
  19. 4
  20. 2
  21. 77
  22. 44
  23. 88
  24. 32
  25. 71
  26. 20
  27. 37
  28. 21
  29. 84
  30. 45
  31. 79
  32. 14
  33. 85
  34. 83
  35. 48
  36. 36
  37. 65
  38. 73
  39. 50
  40. 49

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