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Number Bonds Worksheet (to 10 and 100)

Mental maths lesson 1: Number bonds to 10 and 100 · Set 309 · 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. 1.48 + ? = 100
  2. 2.2 + ? = 10
  3. 3.32 + ? = 100
  4. 4.63 + ? = 100
  5. 5.86 + ? = 100
  6. 6.5 + ? = 10
  7. 7.40 + ? = 100
  8. 8.30 + ? = 100
  9. 9.84 + ? = 100
  10. 10.47 + ? = 100
  11. 11.87 + ? = 100
  12. 12.21 + ? = 100
  13. 13.3 + ? = 10
  14. 14.35 + ? = 100
  15. 15.20 + ? = 100
  16. 16.7 + ? = 10
  17. 17.12 + ? = 100
  18. 18.4 + ? = 10
  19. 19.26 + ? = 100
  20. 20.6 + ? = 10
  21. 21.9 + ? = 10
  22. 22.23 + ? = 100
  23. 23.75 + ? = 100
  24. 24.55 + ? = 100
  25. 25.69 + ? = 100
  26. 26.8 + ? = 10
  27. 27.52 + ? = 100
  28. 28.29 + ? = 100
  29. 29.46 + ? = 100
  30. 30.64 + ? = 100
  31. 31.27 + ? = 100
  32. 32.77 + ? = 100
  33. 33.82 + ? = 100
  34. 34.58 + ? = 100
  35. 35.61 + ? = 100
  36. 36.50 + ? = 100
  37. 37.1 + ? = 10
  38. 38.17 + ? = 100
  39. 39.66 + ? = 100
  40. 40.74 + ? = 100

Answer key

  1. 52
  2. 8
  3. 68
  4. 37
  5. 14
  6. 5
  7. 60
  8. 70
  9. 16
  10. 53
  11. 13
  12. 79
  13. 7
  14. 65
  15. 80
  16. 3
  17. 88
  18. 6
  19. 74
  20. 4
  21. 1
  22. 77
  23. 25
  24. 45
  25. 31
  26. 2
  27. 48
  28. 71
  29. 54
  30. 36
  31. 73
  32. 23
  33. 18
  34. 42
  35. 39
  36. 50
  37. 9
  38. 83
  39. 34
  40. 26

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