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Number Bonds Worksheet (to 10 and 100)

Mental maths lesson 1: Number bonds to 10 and 100 · Set 705 · 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. 1.9 + ? = 10
  2. 2.55 + ? = 100
  3. 3.7 + ? = 10
  4. 4.37 + ? = 100
  5. 5.41 + ? = 100
  6. 6.63 + ? = 100
  7. 7.78 + ? = 100
  8. 8.12 + ? = 100
  9. 9.2 + ? = 10
  10. 10.1 + ? = 10
  11. 11.89 + ? = 100
  12. 12.62 + ? = 100
  13. 13.80 + ? = 100
  14. 14.5 + ? = 10
  15. 15.45 + ? = 100
  16. 16.64 + ? = 100
  17. 17.3 + ? = 10
  18. 18.4 + ? = 10
  19. 19.6 + ? = 10
  20. 20.50 + ? = 100
  21. 21.44 + ? = 100
  22. 22.75 + ? = 100
  23. 23.72 + ? = 100
  24. 24.32 + ? = 100
  25. 25.67 + ? = 100
  26. 26.69 + ? = 100
  27. 27.49 + ? = 100
  28. 28.77 + ? = 100
  29. 29.82 + ? = 100
  30. 30.53 + ? = 100
  31. 31.70 + ? = 100
  32. 32.28 + ? = 100
  33. 33.88 + ? = 100
  34. 34.26 + ? = 100
  35. 35.8 + ? = 10
  36. 36.42 + ? = 100
  37. 37.60 + ? = 100
  38. 38.38 + ? = 100
  39. 39.81 + ? = 100
  40. 40.40 + ? = 100

Answer key

  1. 1
  2. 45
  3. 3
  4. 63
  5. 59
  6. 37
  7. 22
  8. 88
  9. 8
  10. 9
  11. 11
  12. 38
  13. 20
  14. 5
  15. 55
  16. 36
  17. 7
  18. 6
  19. 4
  20. 50
  21. 56
  22. 25
  23. 28
  24. 68
  25. 33
  26. 31
  27. 51
  28. 23
  29. 18
  30. 47
  31. 30
  32. 72
  33. 12
  34. 74
  35. 2
  36. 58
  37. 40
  38. 62
  39. 19
  40. 60

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