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Number Bonds Worksheet (to 10 and 100)

Mental maths lesson 1: Number bonds to 10 and 100 · Set 575 · 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. 1.52 + ? = 100
  2. 2.2 + ? = 10
  3. 3.65 + ? = 100
  4. 4.32 + ? = 100
  5. 5.23 + ? = 100
  6. 6.29 + ? = 100
  7. 7.38 + ? = 100
  8. 8.9 + ? = 10
  9. 9.1 + ? = 10
  10. 10.53 + ? = 100
  11. 11.7 + ? = 10
  12. 12.75 + ? = 100
  13. 13.6 + ? = 10
  14. 14.58 + ? = 100
  15. 15.8 + ? = 10
  16. 16.30 + ? = 100
  17. 17.44 + ? = 100
  18. 18.78 + ? = 100
  19. 19.87 + ? = 100
  20. 20.27 + ? = 100
  21. 21.12 + ? = 100
  22. 22.28 + ? = 100
  23. 23.17 + ? = 100
  24. 24.46 + ? = 100
  25. 25.67 + ? = 100
  26. 26.48 + ? = 100
  27. 27.76 + ? = 100
  28. 28.79 + ? = 100
  29. 29.40 + ? = 100
  30. 30.62 + ? = 100
  31. 31.41 + ? = 100
  32. 32.36 + ? = 100
  33. 33.60 + ? = 100
  34. 34.35 + ? = 100
  35. 35.11 + ? = 100
  36. 36.83 + ? = 100
  37. 37.61 + ? = 100
  38. 38.85 + ? = 100
  39. 39.19 + ? = 100
  40. 40.3 + ? = 10

Answer key

  1. 48
  2. 8
  3. 35
  4. 68
  5. 77
  6. 71
  7. 62
  8. 1
  9. 9
  10. 47
  11. 3
  12. 25
  13. 4
  14. 42
  15. 2
  16. 70
  17. 56
  18. 22
  19. 13
  20. 73
  21. 88
  22. 72
  23. 83
  24. 54
  25. 33
  26. 52
  27. 24
  28. 21
  29. 60
  30. 38
  31. 59
  32. 64
  33. 40
  34. 65
  35. 89
  36. 17
  37. 39
  38. 15
  39. 81
  40. 7

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