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Squaring 2-Digit Numbers Mentally Worksheet

Mental maths lesson 23: Square any 2-digit number: up and down · Set 572 · 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. 1.52² =
  2. 2.32² =
  3. 3.92² =
  4. 4.64² =
  5. 5.98² =
  6. 6.55² =
  7. 7.51² =
  8. 8.91² =
  9. 9.46² =
  10. 10.66² =
  11. 11.31² =
  12. 12.73² =
  13. 13.41² =
  14. 14.88² =
  15. 15.33² =
  16. 16.39² =
  17. 17.99² =
  18. 18.81² =
  19. 19.85² =
  20. 20.65² =
  21. 21.69² =
  22. 22.71² =
  23. 23.61² =
  24. 24.79² =
  25. 25.58² =
  26. 26.77² =
  27. 27.67² =
  28. 28.72² =
  29. 29.82² =
  30. 30.49² =
  31. 31.74² =
  32. 32.43² =
  33. 33.57² =
  34. 34.45² =
  35. 35.37² =
  36. 36.84² =
  37. 37.78² =
  38. 38.48² =
  39. 39.44² =
  40. 40.89² =

Answer key

  1. 2704
  2. 1024
  3. 8464
  4. 4096
  5. 9604
  6. 3025
  7. 2601
  8. 8281
  9. 2116
  10. 4356
  11. 961
  12. 5329
  13. 1681
  14. 7744
  15. 1089
  16. 1521
  17. 9801
  18. 6561
  19. 7225
  20. 4225
  21. 4761
  22. 5041
  23. 3721
  24. 6241
  25. 3364
  26. 5929
  27. 4489
  28. 5184
  29. 6724
  30. 2401
  31. 5476
  32. 1849
  33. 3249
  34. 2025
  35. 1369
  36. 7056
  37. 6084
  38. 2304
  39. 1936
  40. 7921

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