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Number Bonds Worksheet (to 10 and 100)

Mental maths lesson 1: Number bonds to 10 and 100 · Set 374 · 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. 2.35 + ? = 100
  3. 3.69 + ? = 100
  4. 4.26 + ? = 100
  5. 5.2 + ? = 10
  6. 6.80 + ? = 100
  7. 7.39 + ? = 100
  8. 8.89 + ? = 100
  9. 9.1 + ? = 10
  10. 10.71 + ? = 100
  11. 11.32 + ? = 100
  12. 12.37 + ? = 100
  13. 13.29 + ? = 100
  14. 14.6 + ? = 10
  15. 15.5 + ? = 10
  16. 16.70 + ? = 100
  17. 17.7 + ? = 10
  18. 18.4 + ? = 10
  19. 19.12 + ? = 100
  20. 20.61 + ? = 100
  21. 21.52 + ? = 100
  22. 22.87 + ? = 100
  23. 23.36 + ? = 100
  24. 24.79 + ? = 100
  25. 25.21 + ? = 100
  26. 26.45 + ? = 100
  27. 27.63 + ? = 100
  28. 28.11 + ? = 100
  29. 29.74 + ? = 100
  30. 30.86 + ? = 100
  31. 31.49 + ? = 100
  32. 32.83 + ? = 100
  33. 33.19 + ? = 100
  34. 34.40 + ? = 100
  35. 35.24 + ? = 100
  36. 36.8 + ? = 10
  37. 37.3 + ? = 10
  38. 38.30 + ? = 100
  39. 39.14 + ? = 100
  40. 40.16 + ? = 100

Answer key

  1. 1
  2. 65
  3. 31
  4. 74
  5. 8
  6. 20
  7. 61
  8. 11
  9. 9
  10. 29
  11. 68
  12. 63
  13. 71
  14. 4
  15. 5
  16. 30
  17. 3
  18. 6
  19. 88
  20. 39
  21. 48
  22. 13
  23. 64
  24. 21
  25. 79
  26. 55
  27. 37
  28. 89
  29. 26
  30. 14
  31. 51
  32. 17
  33. 81
  34. 60
  35. 76
  36. 2
  37. 7
  38. 70
  39. 86
  40. 84

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