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Number Bonds Worksheet (to 10 and 100)

Mental maths lesson 1: Number bonds to 10 and 100 · Set 852 · 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. 1.82 + ? = 100
  2. 2.5 + ? = 10
  3. 3.3 + ? = 10
  4. 4.18 + ? = 100
  5. 5.2 + ? = 10
  6. 6.46 + ? = 100
  7. 7.72 + ? = 100
  8. 8.7 + ? = 10
  9. 9.8 + ? = 10
  10. 10.86 + ? = 100
  11. 11.9 + ? = 10
  12. 12.1 + ? = 10
  13. 13.4 + ? = 10
  14. 14.15 + ? = 100
  15. 15.57 + ? = 100
  16. 16.31 + ? = 100
  17. 17.61 + ? = 100
  18. 18.40 + ? = 100
  19. 19.69 + ? = 100
  20. 20.26 + ? = 100
  21. 21.21 + ? = 100
  22. 22.6 + ? = 10
  23. 23.75 + ? = 100
  24. 24.74 + ? = 100
  25. 25.77 + ? = 100
  26. 26.35 + ? = 100
  27. 27.14 + ? = 100
  28. 28.79 + ? = 100
  29. 29.55 + ? = 100
  30. 30.62 + ? = 100
  31. 31.67 + ? = 100
  32. 32.68 + ? = 100
  33. 33.33 + ? = 100
  34. 34.28 + ? = 100
  35. 35.47 + ? = 100
  36. 36.58 + ? = 100
  37. 37.34 + ? = 100
  38. 38.76 + ? = 100
  39. 39.44 + ? = 100
  40. 40.13 + ? = 100

Answer key

  1. 18
  2. 5
  3. 7
  4. 82
  5. 8
  6. 54
  7. 28
  8. 3
  9. 2
  10. 14
  11. 1
  12. 9
  13. 6
  14. 85
  15. 43
  16. 69
  17. 39
  18. 60
  19. 31
  20. 74
  21. 79
  22. 4
  23. 25
  24. 26
  25. 23
  26. 65
  27. 86
  28. 21
  29. 45
  30. 38
  31. 33
  32. 32
  33. 67
  34. 72
  35. 53
  36. 42
  37. 66
  38. 24
  39. 56
  40. 87

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