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Number Bonds Worksheet (to 10 and 100)

Mental maths lesson 1: Number bonds to 10 and 100 · Set 706 · 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. 1.9 + ? = 10
  2. 2.1 + ? = 10
  3. 3.84 + ? = 100
  4. 4.2 + ? = 10
  5. 5.30 + ? = 100
  6. 6.81 + ? = 100
  7. 7.42 + ? = 100
  8. 8.3 + ? = 10
  9. 9.5 + ? = 10
  10. 10.14 + ? = 100
  11. 11.6 + ? = 10
  12. 12.22 + ? = 100
  13. 13.66 + ? = 100
  14. 14.62 + ? = 100
  15. 15.23 + ? = 100
  16. 16.4 + ? = 10
  17. 17.69 + ? = 100
  18. 18.24 + ? = 100
  19. 19.71 + ? = 100
  20. 20.8 + ? = 10
  21. 21.88 + ? = 100
  22. 22.11 + ? = 100
  23. 23.7 + ? = 10
  24. 24.35 + ? = 100
  25. 25.25 + ? = 100
  26. 26.58 + ? = 100
  27. 27.21 + ? = 100
  28. 28.44 + ? = 100
  29. 29.59 + ? = 100
  30. 30.45 + ? = 100
  31. 31.47 + ? = 100
  32. 32.37 + ? = 100
  33. 33.50 + ? = 100
  34. 34.28 + ? = 100
  35. 35.40 + ? = 100
  36. 36.78 + ? = 100
  37. 37.60 + ? = 100
  38. 38.52 + ? = 100
  39. 39.53 + ? = 100
  40. 40.19 + ? = 100

Answer key

  1. 1
  2. 9
  3. 16
  4. 8
  5. 70
  6. 19
  7. 58
  8. 7
  9. 5
  10. 86
  11. 4
  12. 78
  13. 34
  14. 38
  15. 77
  16. 6
  17. 31
  18. 76
  19. 29
  20. 2
  21. 12
  22. 89
  23. 3
  24. 65
  25. 75
  26. 42
  27. 79
  28. 56
  29. 41
  30. 55
  31. 53
  32. 63
  33. 50
  34. 72
  35. 60
  36. 22
  37. 40
  38. 48
  39. 47
  40. 81

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