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Number Bonds Worksheet (to 10 and 100)

Mental maths lesson 1: Number bonds to 10 and 100 · Set 479 · 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. 1.43 + ? = 100
  2. 2.4 + ? = 10
  3. 3.1 + ? = 10
  4. 4.5 + ? = 10
  5. 5.35 + ? = 100
  6. 6.60 + ? = 100
  7. 7.67 + ? = 100
  8. 8.24 + ? = 100
  9. 9.8 + ? = 10
  10. 10.63 + ? = 100
  11. 11.82 + ? = 100
  12. 12.6 + ? = 10
  13. 13.34 + ? = 100
  14. 14.37 + ? = 100
  15. 15.22 + ? = 100
  16. 16.2 + ? = 10
  17. 17.75 + ? = 100
  18. 18.61 + ? = 100
  19. 19.42 + ? = 100
  20. 20.31 + ? = 100
  21. 21.73 + ? = 100
  22. 22.7 + ? = 10
  23. 23.69 + ? = 100
  24. 24.51 + ? = 100
  25. 25.13 + ? = 100
  26. 26.74 + ? = 100
  27. 27.29 + ? = 100
  28. 28.77 + ? = 100
  29. 29.65 + ? = 100
  30. 30.87 + ? = 100
  31. 31.3 + ? = 10
  32. 32.14 + ? = 100
  33. 33.9 + ? = 10
  34. 34.18 + ? = 100
  35. 35.72 + ? = 100
  36. 36.45 + ? = 100
  37. 37.59 + ? = 100
  38. 38.62 + ? = 100
  39. 39.78 + ? = 100
  40. 40.53 + ? = 100

Answer key

  1. 57
  2. 6
  3. 9
  4. 5
  5. 65
  6. 40
  7. 33
  8. 76
  9. 2
  10. 37
  11. 18
  12. 4
  13. 66
  14. 63
  15. 78
  16. 8
  17. 25
  18. 39
  19. 58
  20. 69
  21. 27
  22. 3
  23. 31
  24. 49
  25. 87
  26. 26
  27. 71
  28. 23
  29. 35
  30. 13
  31. 7
  32. 86
  33. 1
  34. 82
  35. 28
  36. 55
  37. 41
  38. 38
  39. 22
  40. 47

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