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Number Bonds Worksheet (to 10 and 100)

Mental maths lesson 1: Number bonds to 10 and 100 · Set 431 · 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. 1.32 + ? = 100
  2. 2.59 + ? = 100
  3. 3.2 + ? = 10
  4. 4.13 + ? = 100
  5. 5.63 + ? = 100
  6. 6.4 + ? = 10
  7. 7.87 + ? = 100
  8. 8.18 + ? = 100
  9. 9.49 + ? = 100
  10. 10.9 + ? = 10
  11. 11.33 + ? = 100
  12. 12.5 + ? = 10
  13. 13.3 + ? = 10
  14. 14.70 + ? = 100
  15. 15.23 + ? = 100
  16. 16.56 + ? = 100
  17. 17.50 + ? = 100
  18. 18.60 + ? = 100
  19. 19.44 + ? = 100
  20. 20.40 + ? = 100
  21. 21.6 + ? = 10
  22. 22.1 + ? = 10
  23. 23.46 + ? = 100
  24. 24.26 + ? = 100
  25. 25.80 + ? = 100
  26. 26.65 + ? = 100
  27. 27.48 + ? = 100
  28. 28.20 + ? = 100
  29. 29.7 + ? = 10
  30. 30.71 + ? = 100
  31. 31.76 + ? = 100
  32. 32.89 + ? = 100
  33. 33.79 + ? = 100
  34. 34.36 + ? = 100
  35. 35.52 + ? = 100
  36. 36.64 + ? = 100
  37. 37.8 + ? = 10
  38. 38.45 + ? = 100
  39. 39.88 + ? = 100
  40. 40.11 + ? = 100

Answer key

  1. 68
  2. 41
  3. 8
  4. 87
  5. 37
  6. 6
  7. 13
  8. 82
  9. 51
  10. 1
  11. 67
  12. 5
  13. 7
  14. 30
  15. 77
  16. 44
  17. 50
  18. 40
  19. 56
  20. 60
  21. 4
  22. 9
  23. 54
  24. 74
  25. 20
  26. 35
  27. 52
  28. 80
  29. 3
  30. 29
  31. 24
  32. 11
  33. 21
  34. 64
  35. 48
  36. 36
  37. 2
  38. 55
  39. 12
  40. 89

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