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Number Bonds Worksheet (to 10 and 100)

Mental maths lesson 1: Number bonds to 10 and 100 · Set 136 · 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. 1.36 + ? = 100
  2. 2.9 + ? = 10
  3. 3.28 + ? = 100
  4. 4.3 + ? = 10
  5. 5.62 + ? = 100
  6. 6.8 + ? = 10
  7. 7.88 + ? = 100
  8. 8.63 + ? = 100
  9. 9.79 + ? = 100
  10. 10.7 + ? = 10
  11. 11.33 + ? = 100
  12. 12.12 + ? = 100
  13. 13.46 + ? = 100
  14. 14.30 + ? = 100
  15. 15.75 + ? = 100
  16. 16.17 + ? = 100
  17. 17.53 + ? = 100
  18. 18.78 + ? = 100
  19. 19.2 + ? = 10
  20. 20.71 + ? = 100
  21. 21.5 + ? = 10
  22. 22.23 + ? = 100
  23. 23.21 + ? = 100
  24. 24.26 + ? = 100
  25. 25.6 + ? = 10
  26. 26.1 + ? = 10
  27. 27.37 + ? = 100
  28. 28.32 + ? = 100
  29. 29.85 + ? = 100
  30. 30.29 + ? = 100
  31. 31.4 + ? = 10
  32. 32.47 + ? = 100
  33. 33.35 + ? = 100
  34. 34.74 + ? = 100
  35. 35.19 + ? = 100
  36. 36.49 + ? = 100
  37. 37.83 + ? = 100
  38. 38.84 + ? = 100
  39. 39.67 + ? = 100
  40. 40.50 + ? = 100

Answer key

  1. 64
  2. 1
  3. 72
  4. 7
  5. 38
  6. 2
  7. 12
  8. 37
  9. 21
  10. 3
  11. 67
  12. 88
  13. 54
  14. 70
  15. 25
  16. 83
  17. 47
  18. 22
  19. 8
  20. 29
  21. 5
  22. 77
  23. 79
  24. 74
  25. 4
  26. 9
  27. 63
  28. 68
  29. 15
  30. 71
  31. 6
  32. 53
  33. 65
  34. 26
  35. 81
  36. 51
  37. 17
  38. 16
  39. 33
  40. 50

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