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Number Bonds Worksheet (to 10 and 100)

Mental maths lesson 1: Number bonds to 10 and 100 · Set 827 · 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. 1.88 + ? = 100
  2. 2.2 + ? = 10
  3. 3.23 + ? = 100
  4. 4.3 + ? = 10
  5. 5.1 + ? = 10
  6. 6.54 + ? = 100
  7. 7.48 + ? = 100
  8. 8.6 + ? = 10
  9. 9.8 + ? = 10
  10. 10.34 + ? = 100
  11. 11.45 + ? = 100
  12. 12.20 + ? = 100
  13. 13.9 + ? = 10
  14. 14.62 + ? = 100
  15. 15.4 + ? = 10
  16. 16.31 + ? = 100
  17. 17.5 + ? = 10
  18. 18.28 + ? = 100
  19. 19.50 + ? = 100
  20. 20.56 + ? = 100
  21. 21.7 + ? = 10
  22. 22.82 + ? = 100
  23. 23.19 + ? = 100
  24. 24.80 + ? = 100
  25. 25.14 + ? = 100
  26. 26.83 + ? = 100
  27. 27.29 + ? = 100
  28. 28.47 + ? = 100
  29. 29.81 + ? = 100
  30. 30.21 + ? = 100
  31. 31.60 + ? = 100
  32. 32.57 + ? = 100
  33. 33.66 + ? = 100
  34. 34.68 + ? = 100
  35. 35.30 + ? = 100
  36. 36.86 + ? = 100
  37. 37.12 + ? = 100
  38. 38.35 + ? = 100
  39. 39.37 + ? = 100
  40. 40.73 + ? = 100

Answer key

  1. 12
  2. 8
  3. 77
  4. 7
  5. 9
  6. 46
  7. 52
  8. 4
  9. 2
  10. 66
  11. 55
  12. 80
  13. 1
  14. 38
  15. 6
  16. 69
  17. 5
  18. 72
  19. 50
  20. 44
  21. 3
  22. 18
  23. 81
  24. 20
  25. 86
  26. 17
  27. 71
  28. 53
  29. 19
  30. 79
  31. 40
  32. 43
  33. 34
  34. 32
  35. 70
  36. 14
  37. 88
  38. 65
  39. 63
  40. 27

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