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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 493 · 40 questions
TalentJR

How to do it in your head ((a + b)²): Split: 27 = 20 + 7. Find 20² = 400, 2 × 20 × 7 = 280 and 7² = 49. Add, biggest first: 400 + 280 + 49.

NameDateTime takenScore ___ / 40
  1. 1.23² =
  2. 2.18² =
  3. 3.12² =
  4. 4.21² =
  5. 5.15² =
  6. 6.11² =
  7. 7.22² =
  8. 8.16² =
  9. 9.25² =
  10. 10.13² =
  11. 11.26² =
  12. 12.28² =
  13. 13.19² =
  14. 14.27² =
  15. 15.24² =
  16. 16.14² =
  17. 17.17² =
  18. 18.16² =
  19. 19.29² =
  20. 20.15² =
  21. 21.22² =
  22. 22.12² =
  23. 23.24² =
  24. 24.25² =
  25. 25.23² =
  26. 26.15² =
  27. 27.17² =
  28. 28.14² =
  29. 29.17² =
  30. 30.12² =
  31. 31.26² =
  32. 32.23² =
  33. 33.27² =
  34. 34.15² =
  35. 35.11² =
  36. 36.26² =
  37. 37.25² =
  38. 38.13² =
  39. 39.13² =
  40. 40.19² =

Answer key

  1. 529
  2. 324
  3. 144
  4. 441
  5. 225
  6. 121
  7. 484
  8. 256
  9. 625
  10. 169
  11. 676
  12. 784
  13. 361
  14. 729
  15. 576
  16. 196
  17. 289
  18. 256
  19. 841
  20. 225
  21. 484
  22. 144
  23. 576
  24. 625
  25. 529
  26. 225
  27. 289
  28. 196
  29. 289
  30. 144
  31. 676
  32. 529
  33. 729
  34. 225
  35. 121
  36. 676
  37. 625
  38. 169
  39. 169
  40. 361

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