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Number Bonds Worksheet (to 10 and 100)

Mental maths lesson 1: Number bonds to 10 and 100 · Set 584 · 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. 2.6 + ? = 10
  3. 3.38 + ? = 100
  4. 4.44 + ? = 100
  5. 5.9 + ? = 10
  6. 6.69 + ? = 100
  7. 7.32 + ? = 100
  8. 8.8 + ? = 10
  9. 9.46 + ? = 100
  10. 10.78 + ? = 100
  11. 11.43 + ? = 100
  12. 12.3 + ? = 10
  13. 13.35 + ? = 100
  14. 14.5 + ? = 10
  15. 15.86 + ? = 100
  16. 16.74 + ? = 100
  17. 17.11 + ? = 100
  18. 18.58 + ? = 100
  19. 19.75 + ? = 100
  20. 20.4 + ? = 10
  21. 21.54 + ? = 100
  22. 22.64 + ? = 100
  23. 23.87 + ? = 100
  24. 24.41 + ? = 100
  25. 25.14 + ? = 100
  26. 26.45 + ? = 100
  27. 27.36 + ? = 100
  28. 28.2 + ? = 10
  29. 29.40 + ? = 100
  30. 30.15 + ? = 100
  31. 31.7 + ? = 10
  32. 32.37 + ? = 100
  33. 33.1 + ? = 10
  34. 34.27 + ? = 100
  35. 35.59 + ? = 100
  36. 36.53 + ? = 100
  37. 37.20 + ? = 100
  38. 38.86 + ? = 100
  39. 39.26 + ? = 100
  40. 40.57 + ? = 100

Answer key

  1. 50
  2. 4
  3. 62
  4. 56
  5. 1
  6. 31
  7. 68
  8. 2
  9. 54
  10. 22
  11. 57
  12. 7
  13. 65
  14. 5
  15. 14
  16. 26
  17. 89
  18. 42
  19. 25
  20. 6
  21. 46
  22. 36
  23. 13
  24. 59
  25. 86
  26. 55
  27. 64
  28. 8
  29. 60
  30. 85
  31. 3
  32. 63
  33. 9
  34. 73
  35. 41
  36. 47
  37. 80
  38. 14
  39. 74
  40. 43

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