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Number Bonds Worksheet (to 10 and 100)

Mental maths lesson 1: Number bonds to 10 and 100 · Set 897 · 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. 1.87 + ? = 100
  2. 2.6 + ? = 10
  3. 3.4 + ? = 10
  4. 4.58 + ? = 100
  5. 5.2 + ? = 10
  6. 6.9 + ? = 10
  7. 7.24 + ? = 100
  8. 8.8 + ? = 10
  9. 9.81 + ? = 100
  10. 10.61 + ? = 100
  11. 11.7 + ? = 10
  12. 12.82 + ? = 100
  13. 13.3 + ? = 10
  14. 14.80 + ? = 100
  15. 15.53 + ? = 100
  16. 16.30 + ? = 100
  17. 17.45 + ? = 100
  18. 18.75 + ? = 100
  19. 19.44 + ? = 100
  20. 20.77 + ? = 100
  21. 21.16 + ? = 100
  22. 22.1 + ? = 10
  23. 23.5 + ? = 10
  24. 24.69 + ? = 100
  25. 25.31 + ? = 100
  26. 26.84 + ? = 100
  27. 27.43 + ? = 100
  28. 28.32 + ? = 100
  29. 29.63 + ? = 100
  30. 30.37 + ? = 100
  31. 31.17 + ? = 100
  32. 32.74 + ? = 100
  33. 33.68 + ? = 100
  34. 34.47 + ? = 100
  35. 35.33 + ? = 100
  36. 36.13 + ? = 100
  37. 37.49 + ? = 100
  38. 38.51 + ? = 100
  39. 39.20 + ? = 100
  40. 40.23 + ? = 100

Answer key

  1. 13
  2. 4
  3. 6
  4. 42
  5. 8
  6. 1
  7. 76
  8. 2
  9. 19
  10. 39
  11. 3
  12. 18
  13. 7
  14. 20
  15. 47
  16. 70
  17. 55
  18. 25
  19. 56
  20. 23
  21. 84
  22. 9
  23. 5
  24. 31
  25. 69
  26. 16
  27. 57
  28. 68
  29. 37
  30. 63
  31. 83
  32. 26
  33. 32
  34. 53
  35. 67
  36. 87
  37. 51
  38. 49
  39. 80
  40. 77

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