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Number Bonds Worksheet (to 10 and 100)

Mental maths lesson 1: Number bonds to 10 and 100 · Set 613 · 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. 1.12 + ? = 100
  2. 2.8 + ? = 10
  3. 3.6 + ? = 10
  4. 4.69 + ? = 100
  5. 5.33 + ? = 100
  6. 6.56 + ? = 100
  7. 7.5 + ? = 10
  8. 8.87 + ? = 100
  9. 9.73 + ? = 100
  10. 10.60 + ? = 100
  11. 11.50 + ? = 100
  12. 12.7 + ? = 10
  13. 13.24 + ? = 100
  14. 14.80 + ? = 100
  15. 15.15 + ? = 100
  16. 16.2 + ? = 10
  17. 17.1 + ? = 10
  18. 18.36 + ? = 100
  19. 19.3 + ? = 10
  20. 20.68 + ? = 100
  21. 21.9 + ? = 10
  22. 22.18 + ? = 100
  23. 23.54 + ? = 100
  24. 24.28 + ? = 100
  25. 25.4 + ? = 10
  26. 26.34 + ? = 100
  27. 27.19 + ? = 100
  28. 28.11 + ? = 100
  29. 29.78 + ? = 100
  30. 30.21 + ? = 100
  31. 31.45 + ? = 100
  32. 32.57 + ? = 100
  33. 33.35 + ? = 100
  34. 34.32 + ? = 100
  35. 35.53 + ? = 100
  36. 36.27 + ? = 100
  37. 37.84 + ? = 100
  38. 38.49 + ? = 100
  39. 39.20 + ? = 100
  40. 40.47 + ? = 100

Answer key

  1. 88
  2. 2
  3. 4
  4. 31
  5. 67
  6. 44
  7. 5
  8. 13
  9. 27
  10. 40
  11. 50
  12. 3
  13. 76
  14. 20
  15. 85
  16. 8
  17. 9
  18. 64
  19. 7
  20. 32
  21. 1
  22. 82
  23. 46
  24. 72
  25. 6
  26. 66
  27. 81
  28. 89
  29. 22
  30. 79
  31. 55
  32. 43
  33. 65
  34. 68
  35. 47
  36. 73
  37. 16
  38. 51
  39. 80
  40. 53

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