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Number Bonds Worksheet (to 10 and 100)

Mental maths lesson 1: Number bonds to 10 and 100 · Set 260 · 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. 1.37 + ? = 100
  2. 2.20 + ? = 100
  3. 3.13 + ? = 100
  4. 4.21 + ? = 100
  5. 5.9 + ? = 10
  6. 6.11 + ? = 100
  7. 7.15 + ? = 100
  8. 8.72 + ? = 100
  9. 9.5 + ? = 10
  10. 10.4 + ? = 10
  11. 11.34 + ? = 100
  12. 12.3 + ? = 10
  13. 13.75 + ? = 100
  14. 14.27 + ? = 100
  15. 15.7 + ? = 10
  16. 16.1 + ? = 10
  17. 17.17 + ? = 100
  18. 18.67 + ? = 100
  19. 19.35 + ? = 100
  20. 20.63 + ? = 100
  21. 21.41 + ? = 100
  22. 22.6 + ? = 10
  23. 23.2 + ? = 10
  24. 24.26 + ? = 100
  25. 25.52 + ? = 100
  26. 26.29 + ? = 100
  27. 27.86 + ? = 100
  28. 28.32 + ? = 100
  29. 29.40 + ? = 100
  30. 30.22 + ? = 100
  31. 31.87 + ? = 100
  32. 32.43 + ? = 100
  33. 33.23 + ? = 100
  34. 34.71 + ? = 100
  35. 35.39 + ? = 100
  36. 36.38 + ? = 100
  37. 37.16 + ? = 100
  38. 38.57 + ? = 100
  39. 39.88 + ? = 100
  40. 40.61 + ? = 100

Answer key

  1. 63
  2. 80
  3. 87
  4. 79
  5. 1
  6. 89
  7. 85
  8. 28
  9. 5
  10. 6
  11. 66
  12. 7
  13. 25
  14. 73
  15. 3
  16. 9
  17. 83
  18. 33
  19. 65
  20. 37
  21. 59
  22. 4
  23. 8
  24. 74
  25. 48
  26. 71
  27. 14
  28. 68
  29. 60
  30. 78
  31. 13
  32. 57
  33. 77
  34. 29
  35. 61
  36. 62
  37. 84
  38. 43
  39. 12
  40. 39

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