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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 364 · 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. 1.15² =
  2. 2.16² =
  3. 3.29² =
  4. 4.23² =
  5. 5.28² =
  6. 6.21² =
  7. 7.11² =
  8. 8.24² =
  9. 9.14² =
  10. 10.22² =
  11. 11.18² =
  12. 12.12² =
  13. 13.26² =
  14. 14.13² =
  15. 15.11² =
  16. 16.17² =
  17. 17.19² =
  18. 18.25² =
  19. 19.26² =
  20. 20.27² =
  21. 21.26² =
  22. 22.21² =
  23. 23.21² =
  24. 24.21² =
  25. 25.21² =
  26. 26.15² =
  27. 27.19² =
  28. 28.17² =
  29. 29.22² =
  30. 30.17² =
  31. 31.19² =
  32. 32.11² =
  33. 33.18² =
  34. 34.15² =
  35. 35.16² =
  36. 36.18² =
  37. 37.13² =
  38. 38.23² =
  39. 39.15² =
  40. 40.21² =

Answer key

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

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