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Number Bonds Worksheet (to 10 and 100)

Mental maths lesson 1: Number bonds to 10 and 100 · Set 952 · 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. 1.28 + ? = 100
  2. 2.5 + ? = 10
  3. 3.16 + ? = 100
  4. 4.4 + ? = 10
  5. 5.9 + ? = 10
  6. 6.45 + ? = 100
  7. 7.62 + ? = 100
  8. 8.68 + ? = 100
  9. 9.3 + ? = 10
  10. 10.17 + ? = 100
  11. 11.40 + ? = 100
  12. 12.6 + ? = 10
  13. 13.61 + ? = 100
  14. 14.42 + ? = 100
  15. 15.12 + ? = 100
  16. 16.2 + ? = 10
  17. 17.8 + ? = 10
  18. 18.59 + ? = 100
  19. 19.1 + ? = 10
  20. 20.7 + ? = 10
  21. 21.56 + ? = 100
  22. 22.73 + ? = 100
  23. 23.26 + ? = 100
  24. 24.21 + ? = 100
  25. 25.32 + ? = 100
  26. 26.30 + ? = 100
  27. 27.69 + ? = 100
  28. 28.60 + ? = 100
  29. 29.27 + ? = 100
  30. 30.33 + ? = 100
  31. 31.46 + ? = 100
  32. 32.34 + ? = 100
  33. 33.24 + ? = 100
  34. 34.36 + ? = 100
  35. 35.50 + ? = 100
  36. 36.14 + ? = 100
  37. 37.88 + ? = 100
  38. 38.38 + ? = 100
  39. 39.85 + ? = 100
  40. 40.65 + ? = 100

Answer key

  1. 72
  2. 5
  3. 84
  4. 6
  5. 1
  6. 55
  7. 38
  8. 32
  9. 7
  10. 83
  11. 60
  12. 4
  13. 39
  14. 58
  15. 88
  16. 8
  17. 2
  18. 41
  19. 9
  20. 3
  21. 44
  22. 27
  23. 74
  24. 79
  25. 68
  26. 70
  27. 31
  28. 40
  29. 73
  30. 67
  31. 54
  32. 66
  33. 76
  34. 64
  35. 50
  36. 86
  37. 12
  38. 62
  39. 15
  40. 35

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