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Number Bonds Worksheet (to 10 and 100)

Mental maths lesson 1: Number bonds to 10 and 100 · Set 637 · 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. 1.30 + ? = 100
  2. 2.36 + ? = 100
  3. 3.2 + ? = 10
  4. 4.5 + ? = 10
  5. 5.6 + ? = 10
  6. 6.3 + ? = 10
  7. 7.7 + ? = 10
  8. 8.86 + ? = 100
  9. 9.13 + ? = 100
  10. 10.75 + ? = 100
  11. 11.56 + ? = 100
  12. 12.24 + ? = 100
  13. 13.69 + ? = 100
  14. 14.14 + ? = 100
  15. 15.1 + ? = 10
  16. 16.80 + ? = 100
  17. 17.67 + ? = 100
  18. 18.39 + ? = 100
  19. 19.58 + ? = 100
  20. 20.66 + ? = 100
  21. 21.8 + ? = 10
  22. 22.88 + ? = 100
  23. 23.33 + ? = 100
  24. 24.44 + ? = 100
  25. 25.4 + ? = 10
  26. 26.57 + ? = 100
  27. 27.51 + ? = 100
  28. 28.87 + ? = 100
  29. 29.79 + ? = 100
  30. 30.41 + ? = 100
  31. 31.45 + ? = 100
  32. 32.48 + ? = 100
  33. 33.54 + ? = 100
  34. 34.47 + ? = 100
  35. 35.59 + ? = 100
  36. 36.9 + ? = 10
  37. 37.34 + ? = 100
  38. 38.62 + ? = 100
  39. 39.32 + ? = 100
  40. 40.81 + ? = 100

Answer key

  1. 70
  2. 64
  3. 8
  4. 5
  5. 4
  6. 7
  7. 3
  8. 14
  9. 87
  10. 25
  11. 44
  12. 76
  13. 31
  14. 86
  15. 9
  16. 20
  17. 33
  18. 61
  19. 42
  20. 34
  21. 2
  22. 12
  23. 67
  24. 56
  25. 6
  26. 43
  27. 49
  28. 13
  29. 21
  30. 59
  31. 55
  32. 52
  33. 46
  34. 53
  35. 41
  36. 1
  37. 66
  38. 38
  39. 68
  40. 19

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