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Number Bonds Worksheet (to 10 and 100)

Mental maths lesson 1: Number bonds to 10 and 100 · Set 616 · 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. 2.67 + ? = 100
  3. 3.42 + ? = 100
  4. 4.5 + ? = 10
  5. 5.30 + ? = 100
  6. 6.3 + ? = 10
  7. 7.12 + ? = 100
  8. 8.7 + ? = 10
  9. 9.51 + ? = 100
  10. 10.20 + ? = 100
  11. 11.8 + ? = 10
  12. 12.4 + ? = 10
  13. 13.72 + ? = 100
  14. 14.54 + ? = 100
  15. 15.87 + ? = 100
  16. 16.24 + ? = 100
  17. 17.9 + ? = 10
  18. 18.28 + ? = 100
  19. 19.40 + ? = 100
  20. 20.22 + ? = 100
  21. 21.66 + ? = 100
  22. 22.74 + ? = 100
  23. 23.2 + ? = 10
  24. 24.44 + ? = 100
  25. 25.78 + ? = 100
  26. 26.11 + ? = 100
  27. 27.18 + ? = 100
  28. 28.47 + ? = 100
  29. 29.46 + ? = 100
  30. 30.14 + ? = 100
  31. 31.86 + ? = 100
  32. 32.6 + ? = 10
  33. 33.41 + ? = 100
  34. 34.49 + ? = 100
  35. 35.45 + ? = 100
  36. 36.80 + ? = 100
  37. 37.69 + ? = 100
  38. 38.61 + ? = 100
  39. 39.76 + ? = 100
  40. 40.23 + ? = 100

Answer key

  1. 9
  2. 33
  3. 58
  4. 5
  5. 70
  6. 7
  7. 88
  8. 3
  9. 49
  10. 80
  11. 2
  12. 6
  13. 28
  14. 46
  15. 13
  16. 76
  17. 1
  18. 72
  19. 60
  20. 78
  21. 34
  22. 26
  23. 8
  24. 56
  25. 22
  26. 89
  27. 82
  28. 53
  29. 54
  30. 86
  31. 14
  32. 4
  33. 59
  34. 51
  35. 55
  36. 20
  37. 31
  38. 39
  39. 24
  40. 77

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