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Number Bonds Worksheet (to 10 and 100)

Mental maths lesson 1: Number bonds to 10 and 100 · Set 560 · 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. 1.53 + ? = 100
  2. 2.4 + ? = 10
  3. 3.7 + ? = 10
  4. 4.1 + ? = 10
  5. 5.6 + ? = 10
  6. 6.43 + ? = 100
  7. 7.2 + ? = 10
  8. 8.81 + ? = 100
  9. 9.9 + ? = 10
  10. 10.8 + ? = 10
  11. 11.59 + ? = 100
  12. 12.19 + ? = 100
  13. 13.46 + ? = 100
  14. 14.88 + ? = 100
  15. 15.5 + ? = 10
  16. 16.3 + ? = 10
  17. 17.65 + ? = 100
  18. 18.20 + ? = 100
  19. 19.55 + ? = 100
  20. 20.63 + ? = 100
  21. 21.26 + ? = 100
  22. 22.64 + ? = 100
  23. 23.31 + ? = 100
  24. 24.40 + ? = 100
  25. 25.52 + ? = 100
  26. 26.86 + ? = 100
  27. 27.16 + ? = 100
  28. 28.58 + ? = 100
  29. 29.44 + ? = 100
  30. 30.76 + ? = 100
  31. 31.32 + ? = 100
  32. 32.21 + ? = 100
  33. 33.30 + ? = 100
  34. 34.13 + ? = 100
  35. 35.74 + ? = 100
  36. 36.68 + ? = 100
  37. 37.25 + ? = 100
  38. 38.29 + ? = 100
  39. 39.22 + ? = 100
  40. 40.18 + ? = 100

Answer key

  1. 47
  2. 6
  3. 3
  4. 9
  5. 4
  6. 57
  7. 8
  8. 19
  9. 1
  10. 2
  11. 41
  12. 81
  13. 54
  14. 12
  15. 5
  16. 7
  17. 35
  18. 80
  19. 45
  20. 37
  21. 74
  22. 36
  23. 69
  24. 60
  25. 48
  26. 14
  27. 84
  28. 42
  29. 56
  30. 24
  31. 68
  32. 79
  33. 70
  34. 87
  35. 26
  36. 32
  37. 75
  38. 71
  39. 78
  40. 82

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