← 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 801 · 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. 1.64 + ? = 100
  2. 2.78 + ? = 100
  3. 3.2 + ? = 10
  4. 4.17 + ? = 100
  5. 5.27 + ? = 100
  6. 6.24 + ? = 100
  7. 7.5 + ? = 10
  8. 8.41 + ? = 100
  9. 9.6 + ? = 10
  10. 10.19 + ? = 100
  11. 11.55 + ? = 100
  12. 12.16 + ? = 100
  13. 13.68 + ? = 100
  14. 14.89 + ? = 100
  15. 15.31 + ? = 100
  16. 16.32 + ? = 100
  17. 17.22 + ? = 100
  18. 18.3 + ? = 10
  19. 19.12 + ? = 100
  20. 20.49 + ? = 100
  21. 21.82 + ? = 100
  22. 22.36 + ? = 100
  23. 23.60 + ? = 100
  24. 24.20 + ? = 100
  25. 25.71 + ? = 100
  26. 26.40 + ? = 100
  27. 27.33 + ? = 100
  28. 28.8 + ? = 10
  29. 29.45 + ? = 100
  30. 30.39 + ? = 100
  31. 31.84 + ? = 100
  32. 32.9 + ? = 10
  33. 33.86 + ? = 100
  34. 34.13 + ? = 100
  35. 35.21 + ? = 100
  36. 36.26 + ? = 100
  37. 37.72 + ? = 100
  38. 38.7 + ? = 10
  39. 39.4 + ? = 10
  40. 40.77 + ? = 100

Answer key

  1. 36
  2. 22
  3. 8
  4. 83
  5. 73
  6. 76
  7. 5
  8. 59
  9. 4
  10. 81
  11. 45
  12. 84
  13. 32
  14. 11
  15. 69
  16. 68
  17. 78
  18. 7
  19. 88
  20. 51
  21. 18
  22. 64
  23. 40
  24. 80
  25. 29
  26. 60
  27. 67
  28. 2
  29. 55
  30. 61
  31. 16
  32. 1
  33. 14
  34. 87
  35. 79
  36. 74
  37. 28
  38. 3
  39. 6
  40. 23

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