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Number Bonds Worksheet (to 10 and 100)

Mental maths lesson 1: Number bonds to 10 and 100 · Set 352 · 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. 1.60 + ? = 100
  2. 2.28 + ? = 100
  3. 3.2 + ? = 10
  4. 4.30 + ? = 100
  5. 5.41 + ? = 100
  6. 6.6 + ? = 10
  7. 7.26 + ? = 100
  8. 8.76 + ? = 100
  9. 9.1 + ? = 10
  10. 10.5 + ? = 10
  11. 11.13 + ? = 100
  12. 12.46 + ? = 100
  13. 13.14 + ? = 100
  14. 14.82 + ? = 100
  15. 15.55 + ? = 100
  16. 16.3 + ? = 10
  17. 17.8 + ? = 10
  18. 18.23 + ? = 100
  19. 19.31 + ? = 100
  20. 20.7 + ? = 10
  21. 21.24 + ? = 100
  22. 22.63 + ? = 100
  23. 23.44 + ? = 100
  24. 24.45 + ? = 100
  25. 25.35 + ? = 100
  26. 26.11 + ? = 100
  27. 27.9 + ? = 10
  28. 28.85 + ? = 100
  29. 29.53 + ? = 100
  30. 30.48 + ? = 100
  31. 31.80 + ? = 100
  32. 32.72 + ? = 100
  33. 33.74 + ? = 100
  34. 34.38 + ? = 100
  35. 35.16 + ? = 100
  36. 36.88 + ? = 100
  37. 37.70 + ? = 100
  38. 38.42 + ? = 100
  39. 39.15 + ? = 100
  40. 40.86 + ? = 100

Answer key

  1. 40
  2. 72
  3. 8
  4. 70
  5. 59
  6. 4
  7. 74
  8. 24
  9. 9
  10. 5
  11. 87
  12. 54
  13. 86
  14. 18
  15. 45
  16. 7
  17. 2
  18. 77
  19. 69
  20. 3
  21. 76
  22. 37
  23. 56
  24. 55
  25. 65
  26. 89
  27. 1
  28. 15
  29. 47
  30. 52
  31. 20
  32. 28
  33. 26
  34. 62
  35. 84
  36. 12
  37. 30
  38. 58
  39. 85
  40. 14

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