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Number Bonds Worksheet (to 10 and 100)

Mental maths lesson 1: Number bonds to 10 and 100 · Set 298 · 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. 1.24 + ? = 100
  2. 2.48 + ? = 100
  3. 3.81 + ? = 100
  4. 4.54 + ? = 100
  5. 5.4 + ? = 10
  6. 6.5 + ? = 10
  7. 7.20 + ? = 100
  8. 8.58 + ? = 100
  9. 9.86 + ? = 100
  10. 10.7 + ? = 10
  11. 11.1 + ? = 10
  12. 12.3 + ? = 10
  13. 13.40 + ? = 100
  14. 14.42 + ? = 100
  15. 15.6 + ? = 10
  16. 16.8 + ? = 10
  17. 17.51 + ? = 100
  18. 18.68 + ? = 100
  19. 19.2 + ? = 10
  20. 20.19 + ? = 100
  21. 21.37 + ? = 100
  22. 22.11 + ? = 100
  23. 23.46 + ? = 100
  24. 24.28 + ? = 100
  25. 25.55 + ? = 100
  26. 26.60 + ? = 100
  27. 27.57 + ? = 100
  28. 28.9 + ? = 10
  29. 29.65 + ? = 100
  30. 30.76 + ? = 100
  31. 31.36 + ? = 100
  32. 32.41 + ? = 100
  33. 33.21 + ? = 100
  34. 34.45 + ? = 100
  35. 35.73 + ? = 100
  36. 36.56 + ? = 100
  37. 37.66 + ? = 100
  38. 38.26 + ? = 100
  39. 39.14 + ? = 100
  40. 40.84 + ? = 100

Answer key

  1. 76
  2. 52
  3. 19
  4. 46
  5. 6
  6. 5
  7. 80
  8. 42
  9. 14
  10. 3
  11. 9
  12. 7
  13. 60
  14. 58
  15. 4
  16. 2
  17. 49
  18. 32
  19. 8
  20. 81
  21. 63
  22. 89
  23. 54
  24. 72
  25. 45
  26. 40
  27. 43
  28. 1
  29. 35
  30. 24
  31. 64
  32. 59
  33. 79
  34. 55
  35. 27
  36. 44
  37. 34
  38. 74
  39. 86
  40. 16

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