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Number Bonds Worksheet (to 10 and 100)

Mental maths lesson 1: Number bonds to 10 and 100 · Set 189 · 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. 1.51 + ? = 100
  2. 2.5 + ? = 10
  3. 3.31 + ? = 100
  4. 4.77 + ? = 100
  5. 5.8 + ? = 10
  6. 6.3 + ? = 10
  7. 7.20 + ? = 100
  8. 8.1 + ? = 10
  9. 9.58 + ? = 100
  10. 10.4 + ? = 10
  11. 11.6 + ? = 10
  12. 12.14 + ? = 100
  13. 13.9 + ? = 10
  14. 14.12 + ? = 100
  15. 15.7 + ? = 10
  16. 16.26 + ? = 100
  17. 17.74 + ? = 100
  18. 18.25 + ? = 100
  19. 19.46 + ? = 100
  20. 20.32 + ? = 100
  21. 21.2 + ? = 10
  22. 22.47 + ? = 100
  23. 23.76 + ? = 100
  24. 24.33 + ? = 100
  25. 25.39 + ? = 100
  26. 26.65 + ? = 100
  27. 27.22 + ? = 100
  28. 28.88 + ? = 100
  29. 29.29 + ? = 100
  30. 30.44 + ? = 100
  31. 31.34 + ? = 100
  32. 32.54 + ? = 100
  33. 33.23 + ? = 100
  34. 34.42 + ? = 100
  35. 35.21 + ? = 100
  36. 36.61 + ? = 100
  37. 37.18 + ? = 100
  38. 38.16 + ? = 100
  39. 39.86 + ? = 100
  40. 40.53 + ? = 100

Answer key

  1. 49
  2. 5
  3. 69
  4. 23
  5. 2
  6. 7
  7. 80
  8. 9
  9. 42
  10. 6
  11. 4
  12. 86
  13. 1
  14. 88
  15. 3
  16. 74
  17. 26
  18. 75
  19. 54
  20. 68
  21. 8
  22. 53
  23. 24
  24. 67
  25. 61
  26. 35
  27. 78
  28. 12
  29. 71
  30. 56
  31. 66
  32. 46
  33. 77
  34. 58
  35. 79
  36. 39
  37. 82
  38. 84
  39. 14
  40. 47

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