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Number Bonds Worksheet (to 10 and 100)

Mental maths lesson 1: Number bonds to 10 and 100 · Set 231 · 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. 1.69 + ? = 100
  2. 2.8 + ? = 10
  3. 3.86 + ? = 100
  4. 4.11 + ? = 100
  5. 5.74 + ? = 100
  6. 6.9 + ? = 10
  7. 7.39 + ? = 100
  8. 8.71 + ? = 100
  9. 9.81 + ? = 100
  10. 10.51 + ? = 100
  11. 11.5 + ? = 10
  12. 12.57 + ? = 100
  13. 13.4 + ? = 10
  14. 14.53 + ? = 100
  15. 15.82 + ? = 100
  16. 16.65 + ? = 100
  17. 17.16 + ? = 100
  18. 18.75 + ? = 100
  19. 19.2 + ? = 10
  20. 20.1 + ? = 10
  21. 21.28 + ? = 100
  22. 22.18 + ? = 100
  23. 23.33 + ? = 100
  24. 24.7 + ? = 10
  25. 25.48 + ? = 100
  26. 26.85 + ? = 100
  27. 27.54 + ? = 100
  28. 28.80 + ? = 100
  29. 29.88 + ? = 100
  30. 30.66 + ? = 100
  31. 31.46 + ? = 100
  32. 32.76 + ? = 100
  33. 33.26 + ? = 100
  34. 34.9 + ? = 10
  35. 35.3 + ? = 10
  36. 36.6 + ? = 10
  37. 37.62 + ? = 100
  38. 38.19 + ? = 100
  39. 39.23 + ? = 100
  40. 40.67 + ? = 100

Answer key

  1. 31
  2. 2
  3. 14
  4. 89
  5. 26
  6. 1
  7. 61
  8. 29
  9. 19
  10. 49
  11. 5
  12. 43
  13. 6
  14. 47
  15. 18
  16. 35
  17. 84
  18. 25
  19. 8
  20. 9
  21. 72
  22. 82
  23. 67
  24. 3
  25. 52
  26. 15
  27. 46
  28. 20
  29. 12
  30. 34
  31. 54
  32. 24
  33. 74
  34. 1
  35. 7
  36. 4
  37. 38
  38. 81
  39. 77
  40. 33

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