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Number Bonds Worksheet (to 10 and 100)

Mental maths lesson 1: Number bonds to 10 and 100 · Set 200 · 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. 1.34 + ? = 100
  2. 2.7 + ? = 10
  3. 3.82 + ? = 100
  4. 4.87 + ? = 100
  5. 5.8 + ? = 10
  6. 6.3 + ? = 10
  7. 7.6 + ? = 10
  8. 8.86 + ? = 100
  9. 9.1 + ? = 10
  10. 10.63 + ? = 100
  11. 11.42 + ? = 100
  12. 12.4 + ? = 10
  13. 13.73 + ? = 100
  14. 14.28 + ? = 100
  15. 15.68 + ? = 100
  16. 16.58 + ? = 100
  17. 17.43 + ? = 100
  18. 18.24 + ? = 100
  19. 19.57 + ? = 100
  20. 20.2 + ? = 10
  21. 21.76 + ? = 100
  22. 22.11 + ? = 100
  23. 23.22 + ? = 100
  24. 24.20 + ? = 100
  25. 25.40 + ? = 100
  26. 26.37 + ? = 100
  27. 27.9 + ? = 10
  28. 28.30 + ? = 100
  29. 29.50 + ? = 100
  30. 30.55 + ? = 100
  31. 31.88 + ? = 100
  32. 32.18 + ? = 100
  33. 33.27 + ? = 100
  34. 34.84 + ? = 100
  35. 35.64 + ? = 100
  36. 36.5 + ? = 10
  37. 37.23 + ? = 100
  38. 38.75 + ? = 100
  39. 39.71 + ? = 100
  40. 40.12 + ? = 100

Answer key

  1. 66
  2. 3
  3. 18
  4. 13
  5. 2
  6. 7
  7. 4
  8. 14
  9. 9
  10. 37
  11. 58
  12. 6
  13. 27
  14. 72
  15. 32
  16. 42
  17. 57
  18. 76
  19. 43
  20. 8
  21. 24
  22. 89
  23. 78
  24. 80
  25. 60
  26. 63
  27. 1
  28. 70
  29. 50
  30. 45
  31. 12
  32. 82
  33. 73
  34. 16
  35. 36
  36. 5
  37. 77
  38. 25
  39. 29
  40. 88

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