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Number Bonds Worksheet (to 10 and 100)

Mental maths lesson 1: Number bonds to 10 and 100 · Set 490 · 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. 1.6 + ? = 10
  2. 2.32 + ? = 100
  3. 3.9 + ? = 10
  4. 4.67 + ? = 100
  5. 5.2 + ? = 10
  6. 6.39 + ? = 100
  7. 7.51 + ? = 100
  8. 8.23 + ? = 100
  9. 9.3 + ? = 10
  10. 10.46 + ? = 100
  11. 11.76 + ? = 100
  12. 12.8 + ? = 10
  13. 13.48 + ? = 100
  14. 14.65 + ? = 100
  15. 15.1 + ? = 10
  16. 16.4 + ? = 10
  17. 17.53 + ? = 100
  18. 18.30 + ? = 100
  19. 19.59 + ? = 100
  20. 20.7 + ? = 10
  21. 21.88 + ? = 100
  22. 22.69 + ? = 100
  23. 23.19 + ? = 100
  24. 24.50 + ? = 100
  25. 25.79 + ? = 100
  26. 26.14 + ? = 100
  27. 27.28 + ? = 100
  28. 28.22 + ? = 100
  29. 29.64 + ? = 100
  30. 30.13 + ? = 100
  31. 31.71 + ? = 100
  32. 32.12 + ? = 100
  33. 33.5 + ? = 10
  34. 34.87 + ? = 100
  35. 35.29 + ? = 100
  36. 36.44 + ? = 100
  37. 37.20 + ? = 100
  38. 38.58 + ? = 100
  39. 39.47 + ? = 100
  40. 40.89 + ? = 100

Answer key

  1. 4
  2. 68
  3. 1
  4. 33
  5. 8
  6. 61
  7. 49
  8. 77
  9. 7
  10. 54
  11. 24
  12. 2
  13. 52
  14. 35
  15. 9
  16. 6
  17. 47
  18. 70
  19. 41
  20. 3
  21. 12
  22. 31
  23. 81
  24. 50
  25. 21
  26. 86
  27. 72
  28. 78
  29. 36
  30. 87
  31. 29
  32. 88
  33. 5
  34. 13
  35. 71
  36. 56
  37. 80
  38. 42
  39. 53
  40. 11

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