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Number Bonds Worksheet (to 10 and 100)

Mental maths lesson 1: Number bonds to 10 and 100 · Set 606 · 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. 1.53 + ? = 100
  2. 2.1 + ? = 10
  3. 3.8 + ? = 10
  4. 4.9 + ? = 10
  5. 5.7 + ? = 10
  6. 6.73 + ? = 100
  7. 7.57 + ? = 100
  8. 8.12 + ? = 100
  9. 9.21 + ? = 100
  10. 10.24 + ? = 100
  11. 11.61 + ? = 100
  12. 12.25 + ? = 100
  13. 13.26 + ? = 100
  14. 14.5 + ? = 10
  15. 15.67 + ? = 100
  16. 16.3 + ? = 10
  17. 17.4 + ? = 10
  18. 18.80 + ? = 100
  19. 19.2 + ? = 10
  20. 20.6 + ? = 10
  21. 21.54 + ? = 100
  22. 22.33 + ? = 100
  23. 23.83 + ? = 100
  24. 24.46 + ? = 100
  25. 25.58 + ? = 100
  26. 26.49 + ? = 100
  27. 27.60 + ? = 100
  28. 28.87 + ? = 100
  29. 29.76 + ? = 100
  30. 30.50 + ? = 100
  31. 31.89 + ? = 100
  32. 32.23 + ? = 100
  33. 33.30 + ? = 100
  34. 34.20 + ? = 100
  35. 35.31 + ? = 100
  36. 36.11 + ? = 100
  37. 37.15 + ? = 100
  38. 38.13 + ? = 100
  39. 39.82 + ? = 100
  40. 40.19 + ? = 100

Answer key

  1. 47
  2. 9
  3. 2
  4. 1
  5. 3
  6. 27
  7. 43
  8. 88
  9. 79
  10. 76
  11. 39
  12. 75
  13. 74
  14. 5
  15. 33
  16. 7
  17. 6
  18. 20
  19. 8
  20. 4
  21. 46
  22. 67
  23. 17
  24. 54
  25. 42
  26. 51
  27. 40
  28. 13
  29. 24
  30. 50
  31. 11
  32. 77
  33. 70
  34. 80
  35. 69
  36. 89
  37. 85
  38. 87
  39. 18
  40. 81

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