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Number Bonds Worksheet (to 10 and 100)

Mental maths lesson 1: Number bonds to 10 and 100 · Set 591 · 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. 1.82 + ? = 100
  2. 2.53 + ? = 100
  3. 3.56 + ? = 100
  4. 4.9 + ? = 10
  5. 5.54 + ? = 100
  6. 6.4 + ? = 10
  7. 7.5 + ? = 10
  8. 8.50 + ? = 100
  9. 9.88 + ? = 100
  10. 10.89 + ? = 100
  11. 11.41 + ? = 100
  12. 12.32 + ? = 100
  13. 13.1 + ? = 10
  14. 14.6 + ? = 10
  15. 15.20 + ? = 100
  16. 16.79 + ? = 100
  17. 17.57 + ? = 100
  18. 18.74 + ? = 100
  19. 19.25 + ? = 100
  20. 20.2 + ? = 10
  21. 21.46 + ? = 100
  22. 22.7 + ? = 10
  23. 23.78 + ? = 100
  24. 24.63 + ? = 100
  25. 25.21 + ? = 100
  26. 26.3 + ? = 10
  27. 27.80 + ? = 100
  28. 28.59 + ? = 100
  29. 29.30 + ? = 100
  30. 30.34 + ? = 100
  31. 31.40 + ? = 100
  32. 32.42 + ? = 100
  33. 33.16 + ? = 100
  34. 34.8 + ? = 10
  35. 35.11 + ? = 100
  36. 36.73 + ? = 100
  37. 37.14 + ? = 100
  38. 38.52 + ? = 100
  39. 39.70 + ? = 100
  40. 40.49 + ? = 100

Answer key

  1. 18
  2. 47
  3. 44
  4. 1
  5. 46
  6. 6
  7. 5
  8. 50
  9. 12
  10. 11
  11. 59
  12. 68
  13. 9
  14. 4
  15. 80
  16. 21
  17. 43
  18. 26
  19. 75
  20. 8
  21. 54
  22. 3
  23. 22
  24. 37
  25. 79
  26. 7
  27. 20
  28. 41
  29. 70
  30. 66
  31. 60
  32. 58
  33. 84
  34. 2
  35. 89
  36. 27
  37. 86
  38. 48
  39. 30
  40. 51

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