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Number Bonds Worksheet (to 10 and 100)

Mental maths lesson 1: Number bonds to 10 and 100 · Set 724 · 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. 1.16 + ? = 100
  2. 2.6 + ? = 10
  3. 3.58 + ? = 100
  4. 4.52 + ? = 100
  5. 5.87 + ? = 100
  6. 6.62 + ? = 100
  7. 7.51 + ? = 100
  8. 8.78 + ? = 100
  9. 9.68 + ? = 100
  10. 10.5 + ? = 10
  11. 11.7 + ? = 10
  12. 12.32 + ? = 100
  13. 13.74 + ? = 100
  14. 14.53 + ? = 100
  15. 15.42 + ? = 100
  16. 16.75 + ? = 100
  17. 17.8 + ? = 10
  18. 18.56 + ? = 100
  19. 19.84 + ? = 100
  20. 20.70 + ? = 100
  21. 21.85 + ? = 100
  22. 22.2 + ? = 10
  23. 23.3 + ? = 10
  24. 24.65 + ? = 100
  25. 25.33 + ? = 100
  26. 26.64 + ? = 100
  27. 27.4 + ? = 10
  28. 28.26 + ? = 100
  29. 29.77 + ? = 100
  30. 30.40 + ? = 100
  31. 31.19 + ? = 100
  32. 32.55 + ? = 100
  33. 33.60 + ? = 100
  34. 34.24 + ? = 100
  35. 35.13 + ? = 100
  36. 36.9 + ? = 10
  37. 37.14 + ? = 100
  38. 38.47 + ? = 100
  39. 39.17 + ? = 100
  40. 40.12 + ? = 100

Answer key

  1. 84
  2. 4
  3. 42
  4. 48
  5. 13
  6. 38
  7. 49
  8. 22
  9. 32
  10. 5
  11. 3
  12. 68
  13. 26
  14. 47
  15. 58
  16. 25
  17. 2
  18. 44
  19. 16
  20. 30
  21. 15
  22. 8
  23. 7
  24. 35
  25. 67
  26. 36
  27. 6
  28. 74
  29. 23
  30. 60
  31. 81
  32. 45
  33. 40
  34. 76
  35. 87
  36. 1
  37. 86
  38. 53
  39. 83
  40. 88

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