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Number Bonds Worksheet (to 10 and 100)

Mental maths lesson 1: Number bonds to 10 and 100 · Set 318 · 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. 2.5 + ? = 10
  3. 3.31 + ? = 100
  4. 4.8 + ? = 10
  5. 5.1 + ? = 10
  6. 6.52 + ? = 100
  7. 7.24 + ? = 100
  8. 8.85 + ? = 100
  9. 9.58 + ? = 100
  10. 10.3 + ? = 10
  11. 11.4 + ? = 10
  12. 12.15 + ? = 100
  13. 13.48 + ? = 100
  14. 14.57 + ? = 100
  15. 15.2 + ? = 10
  16. 16.19 + ? = 100
  17. 17.89 + ? = 100
  18. 18.17 + ? = 100
  19. 19.35 + ? = 100
  20. 20.78 + ? = 100
  21. 21.13 + ? = 100
  22. 22.44 + ? = 100
  23. 23.51 + ? = 100
  24. 24.9 + ? = 10
  25. 25.12 + ? = 100
  26. 26.59 + ? = 100
  27. 27.76 + ? = 100
  28. 28.25 + ? = 100
  29. 29.45 + ? = 100
  30. 30.68 + ? = 100
  31. 31.7 + ? = 10
  32. 32.50 + ? = 100
  33. 33.41 + ? = 100
  34. 34.14 + ? = 100
  35. 35.16 + ? = 100
  36. 36.77 + ? = 100
  37. 37.63 + ? = 100
  38. 38.30 + ? = 100
  39. 39.22 + ? = 100
  40. 40.21 + ? = 100

Answer key

  1. 4
  2. 5
  3. 69
  4. 2
  5. 9
  6. 48
  7. 76
  8. 15
  9. 42
  10. 7
  11. 6
  12. 85
  13. 52
  14. 43
  15. 8
  16. 81
  17. 11
  18. 83
  19. 65
  20. 22
  21. 87
  22. 56
  23. 49
  24. 1
  25. 88
  26. 41
  27. 24
  28. 75
  29. 55
  30. 32
  31. 3
  32. 50
  33. 59
  34. 86
  35. 84
  36. 23
  37. 37
  38. 70
  39. 78
  40. 79

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