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Number Bonds Worksheet (to 10 and 100)

Mental maths lesson 1: Number bonds to 10 and 100 · Set 163 · 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. 1.9 + ? = 10
  2. 2.63 + ? = 100
  3. 3.55 + ? = 100
  4. 4.71 + ? = 100
  5. 5.28 + ? = 100
  6. 6.7 + ? = 10
  7. 7.5 + ? = 10
  8. 8.51 + ? = 100
  9. 9.3 + ? = 10
  10. 10.40 + ? = 100
  11. 11.8 + ? = 10
  12. 12.74 + ? = 100
  13. 13.56 + ? = 100
  14. 14.32 + ? = 100
  15. 15.35 + ? = 100
  16. 16.79 + ? = 100
  17. 17.18 + ? = 100
  18. 18.4 + ? = 10
  19. 19.33 + ? = 100
  20. 20.12 + ? = 100
  21. 21.84 + ? = 100
  22. 22.76 + ? = 100
  23. 23.44 + ? = 100
  24. 24.1 + ? = 10
  25. 25.2 + ? = 10
  26. 26.29 + ? = 100
  27. 27.45 + ? = 100
  28. 28.70 + ? = 100
  29. 29.6 + ? = 10
  30. 30.27 + ? = 100
  31. 31.47 + ? = 100
  32. 32.34 + ? = 100
  33. 33.39 + ? = 100
  34. 34.86 + ? = 100
  35. 35.19 + ? = 100
  36. 36.62 + ? = 100
  37. 37.42 + ? = 100
  38. 38.46 + ? = 100
  39. 39.52 + ? = 100
  40. 40.24 + ? = 100

Answer key

  1. 1
  2. 37
  3. 45
  4. 29
  5. 72
  6. 3
  7. 5
  8. 49
  9. 7
  10. 60
  11. 2
  12. 26
  13. 44
  14. 68
  15. 65
  16. 21
  17. 82
  18. 6
  19. 67
  20. 88
  21. 16
  22. 24
  23. 56
  24. 9
  25. 8
  26. 71
  27. 55
  28. 30
  29. 4
  30. 73
  31. 53
  32. 66
  33. 61
  34. 14
  35. 81
  36. 38
  37. 58
  38. 54
  39. 48
  40. 76

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