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Number Bonds Worksheet (to 10 and 100)

Mental maths lesson 1: Number bonds to 10 and 100 · Set 887 · 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. 1.67 + ? = 100
  2. 2.81 + ? = 100
  3. 3.8 + ? = 10
  4. 4.89 + ? = 100
  5. 5.56 + ? = 100
  6. 6.7 + ? = 10
  7. 7.4 + ? = 10
  8. 8.68 + ? = 100
  9. 9.62 + ? = 100
  10. 10.9 + ? = 10
  11. 11.85 + ? = 100
  12. 12.6 + ? = 10
  13. 13.58 + ? = 100
  14. 14.36 + ? = 100
  15. 15.48 + ? = 100
  16. 16.57 + ? = 100
  17. 17.1 + ? = 10
  18. 18.53 + ? = 100
  19. 19.65 + ? = 100
  20. 20.47 + ? = 100
  21. 21.11 + ? = 100
  22. 22.5 + ? = 10
  23. 23.2 + ? = 10
  24. 24.61 + ? = 100
  25. 25.80 + ? = 100
  26. 26.16 + ? = 100
  27. 27.25 + ? = 100
  28. 28.22 + ? = 100
  29. 29.17 + ? = 100
  30. 30.54 + ? = 100
  31. 31.29 + ? = 100
  32. 32.12 + ? = 100
  33. 33.34 + ? = 100
  34. 34.44 + ? = 100
  35. 35.3 + ? = 10
  36. 36.45 + ? = 100
  37. 37.24 + ? = 100
  38. 38.82 + ? = 100
  39. 39.71 + ? = 100
  40. 40.18 + ? = 100

Answer key

  1. 33
  2. 19
  3. 2
  4. 11
  5. 44
  6. 3
  7. 6
  8. 32
  9. 38
  10. 1
  11. 15
  12. 4
  13. 42
  14. 64
  15. 52
  16. 43
  17. 9
  18. 47
  19. 35
  20. 53
  21. 89
  22. 5
  23. 8
  24. 39
  25. 20
  26. 84
  27. 75
  28. 78
  29. 83
  30. 46
  31. 71
  32. 88
  33. 66
  34. 56
  35. 7
  36. 55
  37. 76
  38. 18
  39. 29
  40. 82

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