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Number Bonds Worksheet (to 10 and 100)

Mental maths lesson 1: Number bonds to 10 and 100 · Set 590 · 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. 1.50 + ? = 100
  2. 2.7 + ? = 10
  3. 3.2 + ? = 10
  4. 4.8 + ? = 10
  5. 5.4 + ? = 10
  6. 6.46 + ? = 100
  7. 7.38 + ? = 100
  8. 8.71 + ? = 100
  9. 9.6 + ? = 10
  10. 10.16 + ? = 100
  11. 11.85 + ? = 100
  12. 12.11 + ? = 100
  13. 13.56 + ? = 100
  14. 14.87 + ? = 100
  15. 15.32 + ? = 100
  16. 16.3 + ? = 10
  17. 17.18 + ? = 100
  18. 18.40 + ? = 100
  19. 19.81 + ? = 100
  20. 20.1 + ? = 10
  21. 21.12 + ? = 100
  22. 22.69 + ? = 100
  23. 23.51 + ? = 100
  24. 24.67 + ? = 100
  25. 25.89 + ? = 100
  26. 26.19 + ? = 100
  27. 27.63 + ? = 100
  28. 28.70 + ? = 100
  29. 29.5 + ? = 10
  30. 30.88 + ? = 100
  31. 31.41 + ? = 100
  32. 32.83 + ? = 100
  33. 33.9 + ? = 10
  34. 34.59 + ? = 100
  35. 35.55 + ? = 100
  36. 36.74 + ? = 100
  37. 37.58 + ? = 100
  38. 38.26 + ? = 100
  39. 39.25 + ? = 100
  40. 40.33 + ? = 100

Answer key

  1. 50
  2. 3
  3. 8
  4. 2
  5. 6
  6. 54
  7. 62
  8. 29
  9. 4
  10. 84
  11. 15
  12. 89
  13. 44
  14. 13
  15. 68
  16. 7
  17. 82
  18. 60
  19. 19
  20. 9
  21. 88
  22. 31
  23. 49
  24. 33
  25. 11
  26. 81
  27. 37
  28. 30
  29. 5
  30. 12
  31. 59
  32. 17
  33. 1
  34. 41
  35. 45
  36. 26
  37. 42
  38. 74
  39. 75
  40. 67

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