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Number Bonds Worksheet (to 10 and 100)

Mental maths lesson 1: Number bonds to 10 and 100 · Set 469 · 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. 2.1 + ? = 10
  3. 3.3 + ? = 10
  4. 4.51 + ? = 100
  5. 5.4 + ? = 10
  6. 6.88 + ? = 100
  7. 7.38 + ? = 100
  8. 8.66 + ? = 100
  9. 9.61 + ? = 100
  10. 10.8 + ? = 10
  11. 11.5 + ? = 10
  12. 12.40 + ? = 100
  13. 13.89 + ? = 100
  14. 14.12 + ? = 100
  15. 15.28 + ? = 100
  16. 16.15 + ? = 100
  17. 17.65 + ? = 100
  18. 18.80 + ? = 100
  19. 19.58 + ? = 100
  20. 20.9 + ? = 10
  21. 21.75 + ? = 100
  22. 22.7 + ? = 10
  23. 23.36 + ? = 100
  24. 24.14 + ? = 100
  25. 25.39 + ? = 100
  26. 26.85 + ? = 100
  27. 27.13 + ? = 100
  28. 28.2 + ? = 10
  29. 29.23 + ? = 100
  30. 30.68 + ? = 100
  31. 31.21 + ? = 100
  32. 32.83 + ? = 100
  33. 33.16 + ? = 100
  34. 34.62 + ? = 100
  35. 35.33 + ? = 100
  36. 36.63 + ? = 100
  37. 37.44 + ? = 100
  38. 38.41 + ? = 100
  39. 39.86 + ? = 100
  40. 40.43 + ? = 100

Answer key

  1. 4
  2. 9
  3. 7
  4. 49
  5. 6
  6. 12
  7. 62
  8. 34
  9. 39
  10. 2
  11. 5
  12. 60
  13. 11
  14. 88
  15. 72
  16. 85
  17. 35
  18. 20
  19. 42
  20. 1
  21. 25
  22. 3
  23. 64
  24. 86
  25. 61
  26. 15
  27. 87
  28. 8
  29. 77
  30. 32
  31. 79
  32. 17
  33. 84
  34. 38
  35. 67
  36. 37
  37. 56
  38. 59
  39. 14
  40. 57

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