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Number Bonds Worksheet (to 10 and 100)

Mental maths lesson 1: Number bonds to 10 and 100 · Set 923 · 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. 1.6 + ? = 10
  2. 2.67 + ? = 100
  3. 3.3 + ? = 10
  4. 4.31 + ? = 100
  5. 5.80 + ? = 100
  6. 6.40 + ? = 100
  7. 7.87 + ? = 100
  8. 8.1 + ? = 10
  9. 9.82 + ? = 100
  10. 10.4 + ? = 10
  11. 11.55 + ? = 100
  12. 12.53 + ? = 100
  13. 13.79 + ? = 100
  14. 14.7 + ? = 10
  15. 15.35 + ? = 100
  16. 16.2 + ? = 10
  17. 17.84 + ? = 100
  18. 18.52 + ? = 100
  19. 19.5 + ? = 10
  20. 20.8 + ? = 10
  21. 21.9 + ? = 10
  22. 22.33 + ? = 100
  23. 23.62 + ? = 100
  24. 24.42 + ? = 100
  25. 25.38 + ? = 100
  26. 26.51 + ? = 100
  27. 27.41 + ? = 100
  28. 28.28 + ? = 100
  29. 29.47 + ? = 100
  30. 30.45 + ? = 100
  31. 31.34 + ? = 100
  32. 32.54 + ? = 100
  33. 33.48 + ? = 100
  34. 34.73 + ? = 100
  35. 35.12 + ? = 100
  36. 36.58 + ? = 100
  37. 37.15 + ? = 100
  38. 38.23 + ? = 100
  39. 39.25 + ? = 100
  40. 40.44 + ? = 100

Answer key

  1. 4
  2. 33
  3. 7
  4. 69
  5. 20
  6. 60
  7. 13
  8. 9
  9. 18
  10. 6
  11. 45
  12. 47
  13. 21
  14. 3
  15. 65
  16. 8
  17. 16
  18. 48
  19. 5
  20. 2
  21. 1
  22. 67
  23. 38
  24. 58
  25. 62
  26. 49
  27. 59
  28. 72
  29. 53
  30. 55
  31. 66
  32. 46
  33. 52
  34. 27
  35. 88
  36. 42
  37. 85
  38. 77
  39. 75
  40. 56

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