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Number Bonds Worksheet (to 10 and 100)

Mental maths lesson 1: Number bonds to 10 and 100 · Set 630 · 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. 1.84 + ? = 100
  2. 2.86 + ? = 100
  3. 3.3 + ? = 10
  4. 4.5 + ? = 10
  5. 5.4 + ? = 10
  6. 6.7 + ? = 10
  7. 7.41 + ? = 100
  8. 8.1 + ? = 10
  9. 9.9 + ? = 10
  10. 10.8 + ? = 10
  11. 11.66 + ? = 100
  12. 12.79 + ? = 100
  13. 13.88 + ? = 100
  14. 14.22 + ? = 100
  15. 15.60 + ? = 100
  16. 16.74 + ? = 100
  17. 17.17 + ? = 100
  18. 18.6 + ? = 10
  19. 19.24 + ? = 100
  20. 20.27 + ? = 100
  21. 21.2 + ? = 10
  22. 22.76 + ? = 100
  23. 23.71 + ? = 100
  24. 24.62 + ? = 100
  25. 25.21 + ? = 100
  26. 26.20 + ? = 100
  27. 27.57 + ? = 100
  28. 28.16 + ? = 100
  29. 29.77 + ? = 100
  30. 30.28 + ? = 100
  31. 31.13 + ? = 100
  32. 32.50 + ? = 100
  33. 33.43 + ? = 100
  34. 34.68 + ? = 100
  35. 35.75 + ? = 100
  36. 36.63 + ? = 100
  37. 37.31 + ? = 100
  38. 38.58 + ? = 100
  39. 39.78 + ? = 100
  40. 40.4 + ? = 10

Answer key

  1. 16
  2. 14
  3. 7
  4. 5
  5. 6
  6. 3
  7. 59
  8. 9
  9. 1
  10. 2
  11. 34
  12. 21
  13. 12
  14. 78
  15. 40
  16. 26
  17. 83
  18. 4
  19. 76
  20. 73
  21. 8
  22. 24
  23. 29
  24. 38
  25. 79
  26. 80
  27. 43
  28. 84
  29. 23
  30. 72
  31. 87
  32. 50
  33. 57
  34. 32
  35. 25
  36. 37
  37. 69
  38. 42
  39. 22
  40. 6

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