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Squaring 2-Digit Numbers Mentally Worksheet

Mental maths lesson 23: Square any 2-digit number: up and down · Set 463 · 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. 1.38² =
  2. 2.37² =
  3. 3.88² =
  4. 4.46² =
  5. 5.58² =
  6. 6.71² =
  7. 7.49² =
  8. 8.57² =
  9. 9.51² =
  10. 10.62² =
  11. 11.93² =
  12. 12.97² =
  13. 13.47² =
  14. 14.33² =
  15. 15.52² =
  16. 16.79² =
  17. 17.53² =
  18. 18.66² =
  19. 19.34² =
  20. 20.92² =
  21. 21.98² =
  22. 22.41² =
  23. 23.89² =
  24. 24.91² =
  25. 25.63² =
  26. 26.95² =
  27. 27.72² =
  28. 28.78² =
  29. 29.82² =
  30. 30.32² =
  31. 31.35² =
  32. 32.67² =
  33. 33.65² =
  34. 34.76² =
  35. 35.61² =
  36. 36.39² =
  37. 37.43² =
  38. 38.87² =
  39. 39.99² =
  40. 40.64² =

Answer key

  1. 1444
  2. 1369
  3. 7744
  4. 2116
  5. 3364
  6. 5041
  7. 2401
  8. 3249
  9. 2601
  10. 3844
  11. 8649
  12. 9409
  13. 2209
  14. 1089
  15. 2704
  16. 6241
  17. 2809
  18. 4356
  19. 1156
  20. 8464
  21. 9604
  22. 1681
  23. 7921
  24. 8281
  25. 3969
  26. 9025
  27. 5184
  28. 6084
  29. 6724
  30. 1024
  31. 1225
  32. 4489
  33. 4225
  34. 5776
  35. 3721
  36. 1521
  37. 1849
  38. 7569
  39. 9801
  40. 4096

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