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Number Bonds Worksheet (to 10 and 100)

Mental maths lesson 1: Number bonds to 10 and 100 · Set 693 · 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. 1.75 + ? = 100
  2. 2.8 + ? = 10
  3. 3.53 + ? = 100
  4. 4.3 + ? = 10
  5. 5.19 + ? = 100
  6. 6.57 + ? = 100
  7. 7.18 + ? = 100
  8. 8.17 + ? = 100
  9. 9.1 + ? = 10
  10. 10.9 + ? = 10
  11. 11.11 + ? = 100
  12. 12.12 + ? = 100
  13. 13.74 + ? = 100
  14. 14.16 + ? = 100
  15. 15.59 + ? = 100
  16. 16.6 + ? = 10
  17. 17.4 + ? = 10
  18. 18.80 + ? = 100
  19. 19.44 + ? = 100
  20. 20.21 + ? = 100
  21. 21.5 + ? = 10
  22. 22.86 + ? = 100
  23. 23.2 + ? = 10
  24. 24.24 + ? = 100
  25. 25.68 + ? = 100
  26. 26.54 + ? = 100
  27. 27.46 + ? = 100
  28. 28.78 + ? = 100
  29. 29.65 + ? = 100
  30. 30.20 + ? = 100
  31. 31.7 + ? = 10
  32. 32.35 + ? = 100
  33. 33.56 + ? = 100
  34. 34.62 + ? = 100
  35. 35.15 + ? = 100
  36. 36.34 + ? = 100
  37. 37.36 + ? = 100
  38. 38.52 + ? = 100
  39. 39.55 + ? = 100
  40. 40.33 + ? = 100

Answer key

  1. 25
  2. 2
  3. 47
  4. 7
  5. 81
  6. 43
  7. 82
  8. 83
  9. 9
  10. 1
  11. 89
  12. 88
  13. 26
  14. 84
  15. 41
  16. 4
  17. 6
  18. 20
  19. 56
  20. 79
  21. 5
  22. 14
  23. 8
  24. 76
  25. 32
  26. 46
  27. 54
  28. 22
  29. 35
  30. 80
  31. 3
  32. 65
  33. 44
  34. 38
  35. 85
  36. 66
  37. 64
  38. 48
  39. 45
  40. 67

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