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Number Bonds Worksheet (to 10 and 100)

Mental maths lesson 1: Number bonds to 10 and 100 · Set 883 · 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. 2.8 + ? = 10
  3. 3.4 + ? = 10
  4. 4.71 + ? = 100
  5. 5.5 + ? = 10
  6. 6.80 + ? = 100
  7. 7.1 + ? = 10
  8. 8.43 + ? = 100
  9. 9.68 + ? = 100
  10. 10.74 + ? = 100
  11. 11.40 + ? = 100
  12. 12.28 + ? = 100
  13. 13.70 + ? = 100
  14. 14.84 + ? = 100
  15. 15.14 + ? = 100
  16. 16.13 + ? = 100
  17. 17.85 + ? = 100
  18. 18.72 + ? = 100
  19. 19.73 + ? = 100
  20. 20.78 + ? = 100
  21. 21.7 + ? = 10
  22. 22.3 + ? = 10
  23. 23.87 + ? = 100
  24. 24.9 + ? = 10
  25. 25.88 + ? = 100
  26. 26.31 + ? = 100
  27. 27.79 + ? = 100
  28. 28.52 + ? = 100
  29. 29.53 + ? = 100
  30. 30.61 + ? = 100
  31. 31.6 + ? = 10
  32. 32.37 + ? = 100
  33. 33.77 + ? = 100
  34. 34.47 + ? = 100
  35. 35.76 + ? = 100
  36. 36.75 + ? = 100
  37. 37.82 + ? = 100
  38. 38.27 + ? = 100
  39. 39.30 + ? = 100
  40. 40.49 + ? = 100

Answer key

  1. 8
  2. 2
  3. 6
  4. 29
  5. 5
  6. 20
  7. 9
  8. 57
  9. 32
  10. 26
  11. 60
  12. 72
  13. 30
  14. 16
  15. 86
  16. 87
  17. 15
  18. 28
  19. 27
  20. 22
  21. 3
  22. 7
  23. 13
  24. 1
  25. 12
  26. 69
  27. 21
  28. 48
  29. 47
  30. 39
  31. 4
  32. 63
  33. 23
  34. 53
  35. 24
  36. 25
  37. 18
  38. 73
  39. 70
  40. 51

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