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Number Bonds Worksheet (to 10 and 100)

Mental maths lesson 1: Number bonds to 10 and 100 · Set 574 · 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. 2.2 + ? = 10
  3. 3.4 + ? = 10
  4. 4.53 + ? = 100
  5. 5.68 + ? = 100
  6. 6.59 + ? = 100
  7. 7.7 + ? = 10
  8. 8.66 + ? = 100
  9. 9.8 + ? = 10
  10. 10.1 + ? = 10
  11. 11.11 + ? = 100
  12. 12.71 + ? = 100
  13. 13.3 + ? = 10
  14. 14.12 + ? = 100
  15. 15.5 + ? = 10
  16. 16.58 + ? = 100
  17. 17.6 + ? = 10
  18. 18.87 + ? = 100
  19. 19.88 + ? = 100
  20. 20.44 + ? = 100
  21. 21.37 + ? = 100
  22. 22.49 + ? = 100
  23. 23.32 + ? = 100
  24. 24.40 + ? = 100
  25. 25.26 + ? = 100
  26. 26.17 + ? = 100
  27. 27.69 + ? = 100
  28. 28.9 + ? = 10
  29. 29.16 + ? = 100
  30. 30.19 + ? = 100
  31. 31.85 + ? = 100
  32. 32.29 + ? = 100
  33. 33.33 + ? = 100
  34. 34.52 + ? = 100
  35. 35.42 + ? = 100
  36. 36.65 + ? = 100
  37. 37.56 + ? = 100
  38. 38.55 + ? = 100
  39. 39.45 + ? = 100
  40. 40.75 + ? = 100

Answer key

  1. 50
  2. 8
  3. 6
  4. 47
  5. 32
  6. 41
  7. 3
  8. 34
  9. 2
  10. 9
  11. 89
  12. 29
  13. 7
  14. 88
  15. 5
  16. 42
  17. 4
  18. 13
  19. 12
  20. 56
  21. 63
  22. 51
  23. 68
  24. 60
  25. 74
  26. 83
  27. 31
  28. 1
  29. 84
  30. 81
  31. 15
  32. 71
  33. 67
  34. 48
  35. 58
  36. 35
  37. 44
  38. 45
  39. 55
  40. 25

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