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Number Bonds Worksheet (to 10 and 100)

Mental maths lesson 1: Number bonds to 10 and 100 · Set 466 · 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. 1.43 + ? = 100
  2. 2.88 + ? = 100
  3. 3.60 + ? = 100
  4. 4.8 + ? = 10
  5. 5.49 + ? = 100
  6. 6.6 + ? = 10
  7. 7.77 + ? = 100
  8. 8.55 + ? = 100
  9. 9.63 + ? = 100
  10. 10.87 + ? = 100
  11. 11.62 + ? = 100
  12. 12.9 + ? = 10
  13. 13.39 + ? = 100
  14. 14.7 + ? = 10
  15. 15.1 + ? = 10
  16. 16.59 + ? = 100
  17. 17.66 + ? = 100
  18. 18.2 + ? = 10
  19. 19.71 + ? = 100
  20. 20.5 + ? = 10
  21. 21.11 + ? = 100
  22. 22.27 + ? = 100
  23. 23.4 + ? = 10
  24. 24.56 + ? = 100
  25. 25.29 + ? = 100
  26. 26.24 + ? = 100
  27. 27.18 + ? = 100
  28. 28.21 + ? = 100
  29. 29.80 + ? = 100
  30. 30.51 + ? = 100
  31. 31.26 + ? = 100
  32. 32.23 + ? = 100
  33. 33.79 + ? = 100
  34. 34.3 + ? = 10
  35. 35.76 + ? = 100
  36. 36.74 + ? = 100
  37. 37.37 + ? = 100
  38. 38.81 + ? = 100
  39. 39.84 + ? = 100
  40. 40.41 + ? = 100

Answer key

  1. 57
  2. 12
  3. 40
  4. 2
  5. 51
  6. 4
  7. 23
  8. 45
  9. 37
  10. 13
  11. 38
  12. 1
  13. 61
  14. 3
  15. 9
  16. 41
  17. 34
  18. 8
  19. 29
  20. 5
  21. 89
  22. 73
  23. 6
  24. 44
  25. 71
  26. 76
  27. 82
  28. 79
  29. 20
  30. 49
  31. 74
  32. 77
  33. 21
  34. 7
  35. 24
  36. 26
  37. 63
  38. 19
  39. 16
  40. 59

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