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Number Bonds Worksheet (to 10 and 100)

Mental maths lesson 1: Number bonds to 10 and 100 · Set 462 · 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. 1.4 + ? = 10
  2. 2.33 + ? = 100
  3. 3.80 + ? = 100
  4. 4.3 + ? = 10
  5. 5.52 + ? = 100
  6. 6.8 + ? = 10
  7. 7.9 + ? = 10
  8. 8.42 + ? = 100
  9. 9.36 + ? = 100
  10. 10.55 + ? = 100
  11. 11.53 + ? = 100
  12. 12.7 + ? = 10
  13. 13.6 + ? = 10
  14. 14.16 + ? = 100
  15. 15.66 + ? = 100
  16. 16.21 + ? = 100
  17. 17.61 + ? = 100
  18. 18.23 + ? = 100
  19. 19.1 + ? = 10
  20. 20.28 + ? = 100
  21. 21.29 + ? = 100
  22. 22.2 + ? = 10
  23. 23.45 + ? = 100
  24. 24.86 + ? = 100
  25. 25.88 + ? = 100
  26. 26.65 + ? = 100
  27. 27.17 + ? = 100
  28. 28.44 + ? = 100
  29. 29.35 + ? = 100
  30. 30.64 + ? = 100
  31. 31.38 + ? = 100
  32. 32.73 + ? = 100
  33. 33.5 + ? = 10
  34. 34.25 + ? = 100
  35. 35.30 + ? = 100
  36. 36.69 + ? = 100
  37. 37.81 + ? = 100
  38. 38.56 + ? = 100
  39. 39.22 + ? = 100
  40. 40.11 + ? = 100

Answer key

  1. 6
  2. 67
  3. 20
  4. 7
  5. 48
  6. 2
  7. 1
  8. 58
  9. 64
  10. 45
  11. 47
  12. 3
  13. 4
  14. 84
  15. 34
  16. 79
  17. 39
  18. 77
  19. 9
  20. 72
  21. 71
  22. 8
  23. 55
  24. 14
  25. 12
  26. 35
  27. 83
  28. 56
  29. 65
  30. 36
  31. 62
  32. 27
  33. 5
  34. 75
  35. 70
  36. 31
  37. 19
  38. 44
  39. 78
  40. 89

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