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Number Bonds Worksheet (to 10 and 100)

Mental maths lesson 1: Number bonds to 10 and 100 · Set 615 · 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. 1.74 + ? = 100
  2. 2.2 + ? = 10
  3. 3.4 + ? = 10
  4. 4.8 + ? = 10
  5. 5.1 + ? = 10
  6. 6.41 + ? = 100
  7. 7.9 + ? = 10
  8. 8.69 + ? = 100
  9. 9.45 + ? = 100
  10. 10.11 + ? = 100
  11. 11.3 + ? = 10
  12. 12.6 + ? = 10
  13. 13.71 + ? = 100
  14. 14.54 + ? = 100
  15. 15.7 + ? = 10
  16. 16.46 + ? = 100
  17. 17.38 + ? = 100
  18. 18.21 + ? = 100
  19. 19.35 + ? = 100
  20. 20.60 + ? = 100
  21. 21.29 + ? = 100
  22. 22.20 + ? = 100
  23. 23.66 + ? = 100
  24. 24.22 + ? = 100
  25. 25.79 + ? = 100
  26. 26.5 + ? = 10
  27. 27.73 + ? = 100
  28. 28.55 + ? = 100
  29. 29.52 + ? = 100
  30. 30.19 + ? = 100
  31. 31.49 + ? = 100
  32. 32.82 + ? = 100
  33. 33.68 + ? = 100
  34. 34.58 + ? = 100
  35. 35.87 + ? = 100
  36. 36.85 + ? = 100
  37. 37.88 + ? = 100
  38. 38.18 + ? = 100
  39. 39.23 + ? = 100
  40. 40.25 + ? = 100

Answer key

  1. 26
  2. 8
  3. 6
  4. 2
  5. 9
  6. 59
  7. 1
  8. 31
  9. 55
  10. 89
  11. 7
  12. 4
  13. 29
  14. 46
  15. 3
  16. 54
  17. 62
  18. 79
  19. 65
  20. 40
  21. 71
  22. 80
  23. 34
  24. 78
  25. 21
  26. 5
  27. 27
  28. 45
  29. 48
  30. 81
  31. 51
  32. 18
  33. 32
  34. 42
  35. 13
  36. 15
  37. 12
  38. 82
  39. 77
  40. 75

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