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Number Bonds Worksheet (to 10 and 100)

Mental maths lesson 1: Number bonds to 10 and 100 · Set 508 · 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. 1.4 + ? = 10
  2. 2.23 + ? = 100
  3. 3.5 + ? = 10
  4. 4.70 + ? = 100
  5. 5.1 + ? = 10
  6. 6.45 + ? = 100
  7. 7.14 + ? = 100
  8. 8.83 + ? = 100
  9. 9.2 + ? = 10
  10. 10.55 + ? = 100
  11. 11.7 + ? = 10
  12. 12.21 + ? = 100
  13. 13.22 + ? = 100
  14. 14.69 + ? = 100
  15. 15.16 + ? = 100
  16. 16.3 + ? = 10
  17. 17.12 + ? = 100
  18. 18.80 + ? = 100
  19. 19.77 + ? = 100
  20. 20.8 + ? = 10
  21. 21.66 + ? = 100
  22. 22.58 + ? = 100
  23. 23.54 + ? = 100
  24. 24.6 + ? = 10
  25. 25.71 + ? = 100
  26. 26.87 + ? = 100
  27. 27.17 + ? = 100
  28. 28.28 + ? = 100
  29. 29.9 + ? = 10
  30. 30.62 + ? = 100
  31. 31.20 + ? = 100
  32. 32.36 + ? = 100
  33. 33.33 + ? = 100
  34. 34.84 + ? = 100
  35. 35.51 + ? = 100
  36. 36.43 + ? = 100
  37. 37.68 + ? = 100
  38. 38.85 + ? = 100
  39. 39.74 + ? = 100
  40. 40.44 + ? = 100

Answer key

  1. 6
  2. 77
  3. 5
  4. 30
  5. 9
  6. 55
  7. 86
  8. 17
  9. 8
  10. 45
  11. 3
  12. 79
  13. 78
  14. 31
  15. 84
  16. 7
  17. 88
  18. 20
  19. 23
  20. 2
  21. 34
  22. 42
  23. 46
  24. 4
  25. 29
  26. 13
  27. 83
  28. 72
  29. 1
  30. 38
  31. 80
  32. 64
  33. 67
  34. 16
  35. 49
  36. 57
  37. 32
  38. 15
  39. 26
  40. 56

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