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Number Bonds Worksheet (to 10 and 100)

Mental maths lesson 1: Number bonds to 10 and 100 · Set 587 · 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. 1.2 + ? = 10
  2. 2.32 + ? = 100
  3. 3.45 + ? = 100
  4. 4.3 + ? = 10
  5. 5.56 + ? = 100
  6. 6.76 + ? = 100
  7. 7.1 + ? = 10
  8. 8.68 + ? = 100
  9. 9.7 + ? = 10
  10. 10.9 + ? = 10
  11. 11.62 + ? = 100
  12. 12.21 + ? = 100
  13. 13.79 + ? = 100
  14. 14.48 + ? = 100
  15. 15.39 + ? = 100
  16. 16.18 + ? = 100
  17. 17.33 + ? = 100
  18. 18.61 + ? = 100
  19. 19.23 + ? = 100
  20. 20.26 + ? = 100
  21. 21.38 + ? = 100
  22. 22.15 + ? = 100
  23. 23.58 + ? = 100
  24. 24.52 + ? = 100
  25. 25.40 + ? = 100
  26. 26.4 + ? = 10
  27. 27.27 + ? = 100
  28. 28.19 + ? = 100
  29. 29.53 + ? = 100
  30. 30.14 + ? = 100
  31. 31.74 + ? = 100
  32. 32.37 + ? = 100
  33. 33.22 + ? = 100
  34. 34.89 + ? = 100
  35. 35.5 + ? = 10
  36. 36.70 + ? = 100
  37. 37.6 + ? = 10
  38. 38.88 + ? = 100
  39. 39.11 + ? = 100
  40. 40.8 + ? = 10

Answer key

  1. 8
  2. 68
  3. 55
  4. 7
  5. 44
  6. 24
  7. 9
  8. 32
  9. 3
  10. 1
  11. 38
  12. 79
  13. 21
  14. 52
  15. 61
  16. 82
  17. 67
  18. 39
  19. 77
  20. 74
  21. 62
  22. 85
  23. 42
  24. 48
  25. 60
  26. 6
  27. 73
  28. 81
  29. 47
  30. 86
  31. 26
  32. 63
  33. 78
  34. 11
  35. 5
  36. 30
  37. 4
  38. 12
  39. 89
  40. 2

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