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Number Bonds Worksheet (to 10 and 100)

Mental maths lesson 1: Number bonds to 10 and 100 · Set 995 · 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. 1.1 + ? = 10
  2. 2.46 + ? = 100
  3. 3.61 + ? = 100
  4. 4.58 + ? = 100
  5. 5.24 + ? = 100
  6. 6.56 + ? = 100
  7. 7.82 + ? = 100
  8. 8.19 + ? = 100
  9. 9.9 + ? = 10
  10. 10.3 + ? = 10
  11. 11.7 + ? = 10
  12. 12.32 + ? = 100
  13. 13.33 + ? = 100
  14. 14.35 + ? = 100
  15. 15.5 + ? = 10
  16. 16.25 + ? = 100
  17. 17.84 + ? = 100
  18. 18.2 + ? = 10
  19. 19.4 + ? = 10
  20. 20.66 + ? = 100
  21. 21.6 + ? = 10
  22. 22.87 + ? = 100
  23. 23.81 + ? = 100
  24. 24.48 + ? = 100
  25. 25.42 + ? = 100
  26. 26.21 + ? = 100
  27. 27.86 + ? = 100
  28. 28.29 + ? = 100
  29. 29.18 + ? = 100
  30. 30.44 + ? = 100
  31. 31.34 + ? = 100
  32. 32.23 + ? = 100
  33. 33.27 + ? = 100
  34. 34.74 + ? = 100
  35. 35.65 + ? = 100
  36. 36.14 + ? = 100
  37. 37.68 + ? = 100
  38. 38.11 + ? = 100
  39. 39.8 + ? = 10
  40. 40.72 + ? = 100

Answer key

  1. 9
  2. 54
  3. 39
  4. 42
  5. 76
  6. 44
  7. 18
  8. 81
  9. 1
  10. 7
  11. 3
  12. 68
  13. 67
  14. 65
  15. 5
  16. 75
  17. 16
  18. 8
  19. 6
  20. 34
  21. 4
  22. 13
  23. 19
  24. 52
  25. 58
  26. 79
  27. 14
  28. 71
  29. 82
  30. 56
  31. 66
  32. 77
  33. 73
  34. 26
  35. 35
  36. 86
  37. 32
  38. 89
  39. 2
  40. 28

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