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Number Bonds Worksheet (to 10 and 100)

Mental maths lesson 1: Number bonds to 10 and 100 · Set 434 · 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. 2.30 + ? = 100
  3. 3.1 + ? = 10
  4. 4.4 + ? = 10
  5. 5.80 + ? = 100
  6. 6.2 + ? = 10
  7. 7.9 + ? = 10
  8. 8.85 + ? = 100
  9. 9.3 + ? = 10
  10. 10.70 + ? = 100
  11. 11.76 + ? = 100
  12. 12.16 + ? = 100
  13. 13.8 + ? = 10
  14. 14.14 + ? = 100
  15. 15.7 + ? = 10
  16. 16.33 + ? = 100
  17. 17.11 + ? = 100
  18. 18.68 + ? = 100
  19. 19.19 + ? = 100
  20. 20.56 + ? = 100
  21. 21.45 + ? = 100
  22. 22.77 + ? = 100
  23. 23.53 + ? = 100
  24. 24.55 + ? = 100
  25. 25.35 + ? = 100
  26. 26.64 + ? = 100
  27. 27.22 + ? = 100
  28. 28.81 + ? = 100
  29. 29.38 + ? = 100
  30. 30.5 + ? = 10
  31. 31.78 + ? = 100
  32. 32.88 + ? = 100
  33. 33.69 + ? = 100
  34. 34.37 + ? = 100
  35. 35.39 + ? = 100
  36. 36.49 + ? = 100
  37. 37.20 + ? = 100
  38. 38.46 + ? = 100
  39. 39.13 + ? = 100
  40. 40.48 + ? = 100

Answer key

  1. 4
  2. 70
  3. 9
  4. 6
  5. 20
  6. 8
  7. 1
  8. 15
  9. 7
  10. 30
  11. 24
  12. 84
  13. 2
  14. 86
  15. 3
  16. 67
  17. 89
  18. 32
  19. 81
  20. 44
  21. 55
  22. 23
  23. 47
  24. 45
  25. 65
  26. 36
  27. 78
  28. 19
  29. 62
  30. 5
  31. 22
  32. 12
  33. 31
  34. 63
  35. 61
  36. 51
  37. 80
  38. 54
  39. 87
  40. 52

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