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Number Bonds Worksheet (to 10 and 100)

Mental maths lesson 1: Number bonds to 10 and 100 · Set 882 · 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. 1.88 + ? = 100
  2. 2.2 + ? = 10
  3. 3.49 + ? = 100
  4. 4.68 + ? = 100
  5. 5.16 + ? = 100
  6. 6.18 + ? = 100
  7. 7.5 + ? = 10
  8. 8.15 + ? = 100
  9. 9.6 + ? = 10
  10. 10.29 + ? = 100
  11. 11.3 + ? = 10
  12. 12.51 + ? = 100
  13. 13.66 + ? = 100
  14. 14.63 + ? = 100
  15. 15.9 + ? = 10
  16. 16.83 + ? = 100
  17. 17.64 + ? = 100
  18. 18.79 + ? = 100
  19. 19.43 + ? = 100
  20. 20.4 + ? = 10
  21. 21.1 + ? = 10
  22. 22.40 + ? = 100
  23. 23.23 + ? = 100
  24. 24.65 + ? = 100
  25. 25.82 + ? = 100
  26. 26.50 + ? = 100
  27. 27.81 + ? = 100
  28. 28.7 + ? = 10
  29. 29.67 + ? = 100
  30. 30.27 + ? = 100
  31. 31.30 + ? = 100
  32. 32.14 + ? = 100
  33. 33.22 + ? = 100
  34. 34.21 + ? = 100
  35. 35.47 + ? = 100
  36. 36.12 + ? = 100
  37. 37.45 + ? = 100
  38. 38.58 + ? = 100
  39. 39.85 + ? = 100
  40. 40.17 + ? = 100

Answer key

  1. 12
  2. 8
  3. 51
  4. 32
  5. 84
  6. 82
  7. 5
  8. 85
  9. 4
  10. 71
  11. 7
  12. 49
  13. 34
  14. 37
  15. 1
  16. 17
  17. 36
  18. 21
  19. 57
  20. 6
  21. 9
  22. 60
  23. 77
  24. 35
  25. 18
  26. 50
  27. 19
  28. 3
  29. 33
  30. 73
  31. 70
  32. 86
  33. 78
  34. 79
  35. 53
  36. 88
  37. 55
  38. 42
  39. 15
  40. 83

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