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Number Bonds Worksheet (to 10 and 100)

Mental maths lesson 1: Number bonds to 10 and 100 · Set 576 · 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. 1.17 + ? = 100
  2. 2.8 + ? = 10
  3. 3.5 + ? = 10
  4. 4.9 + ? = 10
  5. 5.2 + ? = 10
  6. 6.1 + ? = 10
  7. 7.57 + ? = 100
  8. 8.6 + ? = 10
  9. 9.58 + ? = 100
  10. 10.4 + ? = 10
  11. 11.50 + ? = 100
  12. 12.3 + ? = 10
  13. 13.39 + ? = 100
  14. 14.31 + ? = 100
  15. 15.43 + ? = 100
  16. 16.33 + ? = 100
  17. 17.69 + ? = 100
  18. 18.76 + ? = 100
  19. 19.81 + ? = 100
  20. 20.46 + ? = 100
  21. 21.34 + ? = 100
  22. 22.77 + ? = 100
  23. 23.36 + ? = 100
  24. 24.24 + ? = 100
  25. 25.88 + ? = 100
  26. 26.66 + ? = 100
  27. 27.28 + ? = 100
  28. 28.72 + ? = 100
  29. 29.60 + ? = 100
  30. 30.75 + ? = 100
  31. 31.21 + ? = 100
  32. 32.52 + ? = 100
  33. 33.65 + ? = 100
  34. 34.73 + ? = 100
  35. 35.7 + ? = 10
  36. 36.55 + ? = 100
  37. 37.87 + ? = 100
  38. 38.30 + ? = 100
  39. 39.74 + ? = 100
  40. 40.27 + ? = 100

Answer key

  1. 83
  2. 2
  3. 5
  4. 1
  5. 8
  6. 9
  7. 43
  8. 4
  9. 42
  10. 6
  11. 50
  12. 7
  13. 61
  14. 69
  15. 57
  16. 67
  17. 31
  18. 24
  19. 19
  20. 54
  21. 66
  22. 23
  23. 64
  24. 76
  25. 12
  26. 34
  27. 72
  28. 28
  29. 40
  30. 25
  31. 79
  32. 48
  33. 35
  34. 27
  35. 3
  36. 45
  37. 13
  38. 70
  39. 26
  40. 73

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