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Number Bonds Worksheet (to 10 and 100)

Mental maths lesson 1: Number bonds to 10 and 100 · Set 571 · 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. 2.82 + ? = 100
  3. 3.6 + ? = 10
  4. 4.14 + ? = 100
  5. 5.40 + ? = 100
  6. 6.3 + ? = 10
  7. 7.61 + ? = 100
  8. 8.63 + ? = 100
  9. 9.26 + ? = 100
  10. 10.62 + ? = 100
  11. 11.22 + ? = 100
  12. 12.1 + ? = 10
  13. 13.4 + ? = 10
  14. 14.39 + ? = 100
  15. 15.88 + ? = 100
  16. 16.50 + ? = 100
  17. 17.8 + ? = 10
  18. 18.17 + ? = 100
  19. 19.51 + ? = 100
  20. 20.67 + ? = 100
  21. 21.31 + ? = 100
  22. 22.29 + ? = 100
  23. 23.19 + ? = 100
  24. 24.46 + ? = 100
  25. 25.5 + ? = 10
  26. 26.9 + ? = 10
  27. 27.48 + ? = 100
  28. 28.13 + ? = 100
  29. 29.89 + ? = 100
  30. 30.23 + ? = 100
  31. 31.55 + ? = 100
  32. 32.69 + ? = 100
  33. 33.30 + ? = 100
  34. 34.34 + ? = 100
  35. 35.81 + ? = 100
  36. 36.73 + ? = 100
  37. 37.38 + ? = 100
  38. 38.15 + ? = 100
  39. 39.72 + ? = 100
  40. 40.70 + ? = 100

Answer key

  1. 8
  2. 18
  3. 4
  4. 86
  5. 60
  6. 7
  7. 39
  8. 37
  9. 74
  10. 38
  11. 78
  12. 9
  13. 6
  14. 61
  15. 12
  16. 50
  17. 2
  18. 83
  19. 49
  20. 33
  21. 69
  22. 71
  23. 81
  24. 54
  25. 5
  26. 1
  27. 52
  28. 87
  29. 11
  30. 77
  31. 45
  32. 31
  33. 70
  34. 66
  35. 19
  36. 27
  37. 62
  38. 85
  39. 28
  40. 30

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