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Number Bonds Worksheet (to 10 and 100)

Mental maths lesson 1: Number bonds to 10 and 100 · Set 202 · 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. 1.8 + ? = 10
  2. 2.41 + ? = 100
  3. 3.27 + ? = 100
  4. 4.73 + ? = 100
  5. 5.2 + ? = 10
  6. 6.1 + ? = 10
  7. 7.22 + ? = 100
  8. 8.35 + ? = 100
  9. 9.5 + ? = 10
  10. 10.75 + ? = 100
  11. 11.6 + ? = 10
  12. 12.9 + ? = 10
  13. 13.7 + ? = 10
  14. 14.4 + ? = 10
  15. 15.82 + ? = 100
  16. 16.67 + ? = 100
  17. 17.3 + ? = 10
  18. 18.50 + ? = 100
  19. 19.29 + ? = 100
  20. 20.72 + ? = 100
  21. 21.14 + ? = 100
  22. 22.65 + ? = 100
  23. 23.28 + ? = 100
  24. 24.48 + ? = 100
  25. 25.52 + ? = 100
  26. 26.33 + ? = 100
  27. 27.58 + ? = 100
  28. 28.76 + ? = 100
  29. 29.57 + ? = 100
  30. 30.64 + ? = 100
  31. 31.37 + ? = 100
  32. 32.31 + ? = 100
  33. 33.78 + ? = 100
  34. 34.71 + ? = 100
  35. 35.30 + ? = 100
  36. 36.74 + ? = 100
  37. 37.23 + ? = 100
  38. 38.88 + ? = 100
  39. 39.24 + ? = 100
  40. 40.53 + ? = 100

Answer key

  1. 2
  2. 59
  3. 73
  4. 27
  5. 8
  6. 9
  7. 78
  8. 65
  9. 5
  10. 25
  11. 4
  12. 1
  13. 3
  14. 6
  15. 18
  16. 33
  17. 7
  18. 50
  19. 71
  20. 28
  21. 86
  22. 35
  23. 72
  24. 52
  25. 48
  26. 67
  27. 42
  28. 24
  29. 43
  30. 36
  31. 63
  32. 69
  33. 22
  34. 29
  35. 70
  36. 26
  37. 77
  38. 12
  39. 76
  40. 47

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