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Number Bonds Worksheet (to 10 and 100)

Mental maths lesson 1: Number bonds to 10 and 100 · Set 389 · 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. 2.1 + ? = 10
  3. 3.20 + ? = 100
  4. 4.8 + ? = 10
  5. 5.18 + ? = 100
  6. 6.57 + ? = 100
  7. 7.86 + ? = 100
  8. 8.23 + ? = 100
  9. 9.74 + ? = 100
  10. 10.56 + ? = 100
  11. 11.49 + ? = 100
  12. 12.4 + ? = 10
  13. 13.5 + ? = 10
  14. 14.88 + ? = 100
  15. 15.6 + ? = 10
  16. 16.14 + ? = 100
  17. 17.45 + ? = 100
  18. 18.37 + ? = 100
  19. 19.73 + ? = 100
  20. 20.82 + ? = 100
  21. 21.3 + ? = 10
  22. 22.27 + ? = 100
  23. 23.35 + ? = 100
  24. 24.54 + ? = 100
  25. 25.51 + ? = 100
  26. 26.12 + ? = 100
  27. 27.62 + ? = 100
  28. 28.55 + ? = 100
  29. 29.9 + ? = 10
  30. 30.26 + ? = 100
  31. 31.16 + ? = 100
  32. 32.65 + ? = 100
  33. 33.32 + ? = 100
  34. 34.68 + ? = 100
  35. 35.63 + ? = 100
  36. 36.69 + ? = 100
  37. 37.24 + ? = 100
  38. 38.33 + ? = 100
  39. 39.40 + ? = 100
  40. 40.30 + ? = 100

Answer key

  1. 8
  2. 9
  3. 80
  4. 2
  5. 82
  6. 43
  7. 14
  8. 77
  9. 26
  10. 44
  11. 51
  12. 6
  13. 5
  14. 12
  15. 4
  16. 86
  17. 55
  18. 63
  19. 27
  20. 18
  21. 7
  22. 73
  23. 65
  24. 46
  25. 49
  26. 88
  27. 38
  28. 45
  29. 1
  30. 74
  31. 84
  32. 35
  33. 68
  34. 32
  35. 37
  36. 31
  37. 76
  38. 67
  39. 60
  40. 70

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