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Number Bonds Worksheet (to 10 and 100)

Mental maths lesson 1: Number bonds to 10 and 100 · Set 290 · 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. 1.22 + ? = 100
  2. 2.77 + ? = 100
  3. 3.52 + ? = 100
  4. 4.66 + ? = 100
  5. 5.15 + ? = 100
  6. 6.46 + ? = 100
  7. 7.68 + ? = 100
  8. 8.31 + ? = 100
  9. 9.62 + ? = 100
  10. 10.53 + ? = 100
  11. 11.19 + ? = 100
  12. 12.54 + ? = 100
  13. 13.11 + ? = 100
  14. 14.44 + ? = 100
  15. 15.3 + ? = 10
  16. 16.1 + ? = 10
  17. 17.5 + ? = 10
  18. 18.9 + ? = 10
  19. 19.18 + ? = 100
  20. 20.21 + ? = 100
  21. 21.2 + ? = 10
  22. 22.87 + ? = 100
  23. 23.86 + ? = 100
  24. 24.88 + ? = 100
  25. 25.6 + ? = 10
  26. 26.4 + ? = 10
  27. 27.30 + ? = 100
  28. 28.39 + ? = 100
  29. 29.37 + ? = 100
  30. 30.8 + ? = 10
  31. 31.67 + ? = 100
  32. 32.33 + ? = 100
  33. 33.55 + ? = 100
  34. 34.48 + ? = 100
  35. 35.75 + ? = 100
  36. 36.64 + ? = 100
  37. 37.70 + ? = 100
  38. 38.35 + ? = 100
  39. 39.74 + ? = 100
  40. 40.43 + ? = 100

Answer key

  1. 78
  2. 23
  3. 48
  4. 34
  5. 85
  6. 54
  7. 32
  8. 69
  9. 38
  10. 47
  11. 81
  12. 46
  13. 89
  14. 56
  15. 7
  16. 9
  17. 5
  18. 1
  19. 82
  20. 79
  21. 8
  22. 13
  23. 14
  24. 12
  25. 4
  26. 6
  27. 70
  28. 61
  29. 63
  30. 2
  31. 33
  32. 67
  33. 45
  34. 52
  35. 25
  36. 36
  37. 30
  38. 65
  39. 26
  40. 57

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