← Number bonds to 10 and 100 lesson New set →

Number Bonds Worksheet (to 10 and 100)

Mental maths lesson 1: Number bonds to 10 and 100 · Set 700 · 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. 1.32 + ? = 100
  2. 2.4 + ? = 10
  3. 3.9 + ? = 10
  4. 4.20 + ? = 100
  5. 5.82 + ? = 100
  6. 6.6 + ? = 10
  7. 7.8 + ? = 10
  8. 8.3 + ? = 10
  9. 9.73 + ? = 100
  10. 10.56 + ? = 100
  11. 11.5 + ? = 10
  12. 12.42 + ? = 100
  13. 13.13 + ? = 100
  14. 14.2 + ? = 10
  15. 15.7 + ? = 10
  16. 16.21 + ? = 100
  17. 17.62 + ? = 100
  18. 18.71 + ? = 100
  19. 19.51 + ? = 100
  20. 20.29 + ? = 100
  21. 21.17 + ? = 100
  22. 22.12 + ? = 100
  23. 23.39 + ? = 100
  24. 24.58 + ? = 100
  25. 25.47 + ? = 100
  26. 26.25 + ? = 100
  27. 27.59 + ? = 100
  28. 28.76 + ? = 100
  29. 29.37 + ? = 100
  30. 30.1 + ? = 10
  31. 31.43 + ? = 100
  32. 32.89 + ? = 100
  33. 33.16 + ? = 100
  34. 34.81 + ? = 100
  35. 35.78 + ? = 100
  36. 36.33 + ? = 100
  37. 37.27 + ? = 100
  38. 38.22 + ? = 100
  39. 39.14 + ? = 100
  40. 40.72 + ? = 100

Answer key

  1. 68
  2. 6
  3. 1
  4. 80
  5. 18
  6. 4
  7. 2
  8. 7
  9. 27
  10. 44
  11. 5
  12. 58
  13. 87
  14. 8
  15. 3
  16. 79
  17. 38
  18. 29
  19. 49
  20. 71
  21. 83
  22. 88
  23. 61
  24. 42
  25. 53
  26. 75
  27. 41
  28. 24
  29. 63
  30. 9
  31. 57
  32. 11
  33. 84
  34. 19
  35. 22
  36. 67
  37. 73
  38. 78
  39. 86
  40. 28

Free mental maths lessons, practice and worksheets at talentjr.in/mental-maths