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Squaring 2-Digit Numbers Mentally Worksheet

Mental maths lesson 23: Square any 2-digit number: up and down · Set 87 · 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. 1.63² =
  2. 2.71² =
  3. 3.53² =
  4. 4.61² =
  5. 5.69² =
  6. 6.89² =
  7. 7.41² =
  8. 8.38² =
  9. 9.73² =
  10. 10.47² =
  11. 11.64² =
  12. 12.36² =
  13. 13.82² =
  14. 14.91² =
  15. 15.81² =
  16. 16.35² =
  17. 17.97² =
  18. 18.62² =
  19. 19.33² =
  20. 20.51² =
  21. 21.48² =
  22. 22.96² =
  23. 23.83² =
  24. 24.98² =
  25. 25.46² =
  26. 26.67² =
  27. 27.68² =
  28. 28.34² =
  29. 29.55² =
  30. 30.72² =
  31. 31.49² =
  32. 32.45² =
  33. 33.65² =
  34. 34.74² =
  35. 35.95² =
  36. 36.52² =
  37. 37.79² =
  38. 38.31² =
  39. 39.39² =
  40. 40.85² =

Answer key

  1. 3969
  2. 5041
  3. 2809
  4. 3721
  5. 4761
  6. 7921
  7. 1681
  8. 1444
  9. 5329
  10. 2209
  11. 4096
  12. 1296
  13. 6724
  14. 8281
  15. 6561
  16. 1225
  17. 9409
  18. 3844
  19. 1089
  20. 2601
  21. 2304
  22. 9216
  23. 6889
  24. 9604
  25. 2116
  26. 4489
  27. 4624
  28. 1156
  29. 3025
  30. 5184
  31. 2401
  32. 2025
  33. 4225
  34. 5476
  35. 9025
  36. 2704
  37. 6241
  38. 961
  39. 1521
  40. 7225

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