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Number Bonds Worksheet (to 10 and 100)

Mental maths lesson 1: Number bonds to 10 and 100 · Set 164 · 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. 1.35 + ? = 100
  2. 2.2 + ? = 10
  3. 3.16 + ? = 100
  4. 4.45 + ? = 100
  5. 5.78 + ? = 100
  6. 6.48 + ? = 100
  7. 7.20 + ? = 100
  8. 8.3 + ? = 10
  9. 9.7 + ? = 10
  10. 10.9 + ? = 10
  11. 11.60 + ? = 100
  12. 12.1 + ? = 10
  13. 13.24 + ? = 100
  14. 14.5 + ? = 10
  15. 15.52 + ? = 100
  16. 16.58 + ? = 100
  17. 17.55 + ? = 100
  18. 18.4 + ? = 10
  19. 19.21 + ? = 100
  20. 20.36 + ? = 100
  21. 21.43 + ? = 100
  22. 22.44 + ? = 100
  23. 23.62 + ? = 100
  24. 24.6 + ? = 10
  25. 25.28 + ? = 100
  26. 26.75 + ? = 100
  27. 27.54 + ? = 100
  28. 28.76 + ? = 100
  29. 29.66 + ? = 100
  30. 30.8 + ? = 10
  31. 31.31 + ? = 100
  32. 32.34 + ? = 100
  33. 33.50 + ? = 100
  34. 34.19 + ? = 100
  35. 35.79 + ? = 100
  36. 36.11 + ? = 100
  37. 37.65 + ? = 100
  38. 38.40 + ? = 100
  39. 39.37 + ? = 100
  40. 40.53 + ? = 100

Answer key

  1. 65
  2. 8
  3. 84
  4. 55
  5. 22
  6. 52
  7. 80
  8. 7
  9. 3
  10. 1
  11. 40
  12. 9
  13. 76
  14. 5
  15. 48
  16. 42
  17. 45
  18. 6
  19. 79
  20. 64
  21. 57
  22. 56
  23. 38
  24. 4
  25. 72
  26. 25
  27. 46
  28. 24
  29. 34
  30. 2
  31. 69
  32. 66
  33. 50
  34. 81
  35. 21
  36. 89
  37. 35
  38. 60
  39. 63
  40. 47

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