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Number Bonds Worksheet (to 10 and 100)

Mental maths lesson 1: Number bonds to 10 and 100 · Set 572 · 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. 1.36 + ? = 100
  2. 2.3 + ? = 10
  3. 3.5 + ? = 10
  4. 4.4 + ? = 10
  5. 5.18 + ? = 100
  6. 6.2 + ? = 10
  7. 7.30 + ? = 100
  8. 8.1 + ? = 10
  9. 9.6 + ? = 10
  10. 10.9 + ? = 10
  11. 11.48 + ? = 100
  12. 12.77 + ? = 100
  13. 13.8 + ? = 10
  14. 14.78 + ? = 100
  15. 15.12 + ? = 100
  16. 16.67 + ? = 100
  17. 17.31 + ? = 100
  18. 18.19 + ? = 100
  19. 19.41 + ? = 100
  20. 20.81 + ? = 100
  21. 21.61 + ? = 100
  22. 22.85 + ? = 100
  23. 23.80 + ? = 100
  24. 24.7 + ? = 10
  25. 25.69 + ? = 100
  26. 26.42 + ? = 100
  27. 27.23 + ? = 100
  28. 28.13 + ? = 100
  29. 29.40 + ? = 100
  30. 30.15 + ? = 100
  31. 31.63 + ? = 100
  32. 32.20 + ? = 100
  33. 33.43 + ? = 100
  34. 34.17 + ? = 100
  35. 35.51 + ? = 100
  36. 36.22 + ? = 100
  37. 37.88 + ? = 100
  38. 38.37 + ? = 100
  39. 39.32 + ? = 100
  40. 40.14 + ? = 100

Answer key

  1. 64
  2. 7
  3. 5
  4. 6
  5. 82
  6. 8
  7. 70
  8. 9
  9. 4
  10. 1
  11. 52
  12. 23
  13. 2
  14. 22
  15. 88
  16. 33
  17. 69
  18. 81
  19. 59
  20. 19
  21. 39
  22. 15
  23. 20
  24. 3
  25. 31
  26. 58
  27. 77
  28. 87
  29. 60
  30. 85
  31. 37
  32. 80
  33. 57
  34. 83
  35. 49
  36. 78
  37. 12
  38. 63
  39. 68
  40. 86

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