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Number Bonds Worksheet (to 10 and 100)

Mental maths lesson 1: Number bonds to 10 and 100 · Set 178 · 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. 1.54 + ? = 100
  2. 2.3 + ? = 10
  3. 3.53 + ? = 100
  4. 4.84 + ? = 100
  5. 5.36 + ? = 100
  6. 6.5 + ? = 10
  7. 7.8 + ? = 10
  8. 8.19 + ? = 100
  9. 9.9 + ? = 10
  10. 10.45 + ? = 100
  11. 11.63 + ? = 100
  12. 12.2 + ? = 10
  13. 13.24 + ? = 100
  14. 14.80 + ? = 100
  15. 15.55 + ? = 100
  16. 16.65 + ? = 100
  17. 17.7 + ? = 10
  18. 18.77 + ? = 100
  19. 19.83 + ? = 100
  20. 20.23 + ? = 100
  21. 21.22 + ? = 100
  22. 22.4 + ? = 10
  23. 23.82 + ? = 100
  24. 24.81 + ? = 100
  25. 25.66 + ? = 100
  26. 26.87 + ? = 100
  27. 27.34 + ? = 100
  28. 28.29 + ? = 100
  29. 29.1 + ? = 10
  30. 30.50 + ? = 100
  31. 31.25 + ? = 100
  32. 32.11 + ? = 100
  33. 33.76 + ? = 100
  34. 34.74 + ? = 100
  35. 35.85 + ? = 100
  36. 36.6 + ? = 10
  37. 37.48 + ? = 100
  38. 38.59 + ? = 100
  39. 39.69 + ? = 100
  40. 40.27 + ? = 100

Answer key

  1. 46
  2. 7
  3. 47
  4. 16
  5. 64
  6. 5
  7. 2
  8. 81
  9. 1
  10. 55
  11. 37
  12. 8
  13. 76
  14. 20
  15. 45
  16. 35
  17. 3
  18. 23
  19. 17
  20. 77
  21. 78
  22. 6
  23. 18
  24. 19
  25. 34
  26. 13
  27. 66
  28. 71
  29. 9
  30. 50
  31. 75
  32. 89
  33. 24
  34. 26
  35. 15
  36. 4
  37. 52
  38. 41
  39. 31
  40. 73

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