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Number Bonds Worksheet (to 10 and 100)

Mental maths lesson 1: Number bonds to 10 and 100 · Set 740 · 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. 1.3 + ? = 10
  2. 2.25 + ? = 100
  3. 3.9 + ? = 10
  4. 4.7 + ? = 10
  5. 5.32 + ? = 100
  6. 6.8 + ? = 10
  7. 7.20 + ? = 100
  8. 8.2 + ? = 10
  9. 9.64 + ? = 100
  10. 10.12 + ? = 100
  11. 11.5 + ? = 10
  12. 12.63 + ? = 100
  13. 13.19 + ? = 100
  14. 14.51 + ? = 100
  15. 15.55 + ? = 100
  16. 16.17 + ? = 100
  17. 17.43 + ? = 100
  18. 18.22 + ? = 100
  19. 19.39 + ? = 100
  20. 20.27 + ? = 100
  21. 21.37 + ? = 100
  22. 22.4 + ? = 10
  23. 23.42 + ? = 100
  24. 24.67 + ? = 100
  25. 25.88 + ? = 100
  26. 26.11 + ? = 100
  27. 27.84 + ? = 100
  28. 28.49 + ? = 100
  29. 29.41 + ? = 100
  30. 30.53 + ? = 100
  31. 31.24 + ? = 100
  32. 32.80 + ? = 100
  33. 33.56 + ? = 100
  34. 34.36 + ? = 100
  35. 35.44 + ? = 100
  36. 36.21 + ? = 100
  37. 37.14 + ? = 100
  38. 38.77 + ? = 100
  39. 39.72 + ? = 100
  40. 40.1 + ? = 10

Answer key

  1. 7
  2. 75
  3. 1
  4. 3
  5. 68
  6. 2
  7. 80
  8. 8
  9. 36
  10. 88
  11. 5
  12. 37
  13. 81
  14. 49
  15. 45
  16. 83
  17. 57
  18. 78
  19. 61
  20. 73
  21. 63
  22. 6
  23. 58
  24. 33
  25. 12
  26. 89
  27. 16
  28. 51
  29. 59
  30. 47
  31. 76
  32. 20
  33. 44
  34. 64
  35. 56
  36. 79
  37. 86
  38. 23
  39. 28
  40. 9

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