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Squaring 2-Digit Numbers Mentally Worksheet

Mental maths lesson 23: Square any 2-digit number: up and down · Set 608 · 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. 1.72² =
  2. 2.68² =
  3. 3.46² =
  4. 4.33² =
  5. 5.78² =
  6. 6.93² =
  7. 7.86² =
  8. 8.51² =
  9. 9.95² =
  10. 10.66² =
  11. 11.61² =
  12. 12.58² =
  13. 13.88² =
  14. 14.42² =
  15. 15.76² =
  16. 16.77² =
  17. 17.48² =
  18. 18.41² =
  19. 19.39² =
  20. 20.47² =
  21. 21.67² =
  22. 22.92² =
  23. 23.74² =
  24. 24.79² =
  25. 25.49² =
  26. 26.35² =
  27. 27.37² =
  28. 28.96² =
  29. 29.52² =
  30. 30.97² =
  31. 31.56² =
  32. 32.62² =
  33. 33.99² =
  34. 34.94² =
  35. 35.38² =
  36. 36.84² =
  37. 37.81² =
  38. 38.85² =
  39. 39.44² =
  40. 40.55² =

Answer key

  1. 5184
  2. 4624
  3. 2116
  4. 1089
  5. 6084
  6. 8649
  7. 7396
  8. 2601
  9. 9025
  10. 4356
  11. 3721
  12. 3364
  13. 7744
  14. 1764
  15. 5776
  16. 5929
  17. 2304
  18. 1681
  19. 1521
  20. 2209
  21. 4489
  22. 8464
  23. 5476
  24. 6241
  25. 2401
  26. 1225
  27. 1369
  28. 9216
  29. 2704
  30. 9409
  31. 3136
  32. 3844
  33. 9801
  34. 8836
  35. 1444
  36. 7056
  37. 6561
  38. 7225
  39. 1936
  40. 3025

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