← Square any 2-digit number: up and down lesson New set →

Squaring 2-Digit Numbers Mentally Worksheet

Mental maths lesson 23: Square any 2-digit number: up and down · Set 322 · 40 questions
TalentJR

How to do it in your head (Up and down): Find how far the number is from the nearest ten (the distance). Go that distance up and the same distance down, and multiply the two new numbers. Add the distance squared.

NameDateTime takenScore ___ / 40
  1. 1.46² =
  2. 2.42² =
  3. 3.49² =
  4. 4.45² =
  5. 5.52² =
  6. 6.66² =
  7. 7.33² =
  8. 8.41² =
  9. 9.98² =
  10. 10.44² =
  11. 11.34² =
  12. 12.82² =
  13. 13.88² =
  14. 14.32² =
  15. 15.79² =
  16. 16.48² =
  17. 17.43² =
  18. 18.76² =
  19. 19.91² =
  20. 20.87² =
  21. 21.51² =
  22. 22.64² =
  23. 23.72² =
  24. 24.95² =
  25. 25.39² =
  26. 26.89² =
  27. 27.37² =
  28. 28.53² =
  29. 29.62² =
  30. 30.31² =
  31. 31.74² =
  32. 32.55² =
  33. 33.57² =
  34. 34.71² =
  35. 35.68² =
  36. 36.78² =
  37. 37.73² =
  38. 38.59² =
  39. 39.67² =
  40. 40.54² =

Answer key

  1. 2116
  2. 1764
  3. 2401
  4. 2025
  5. 2704
  6. 4356
  7. 1089
  8. 1681
  9. 9604
  10. 1936
  11. 1156
  12. 6724
  13. 7744
  14. 1024
  15. 6241
  16. 2304
  17. 1849
  18. 5776
  19. 8281
  20. 7569
  21. 2601
  22. 4096
  23. 5184
  24. 9025
  25. 1521
  26. 7921
  27. 1369
  28. 2809
  29. 3844
  30. 961
  31. 5476
  32. 3025
  33. 3249
  34. 5041
  35. 4624
  36. 6084
  37. 5329
  38. 3481
  39. 4489
  40. 2916

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