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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 368 · 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. 2.19² =
  3. 3.18² =
  4. 4.12² =
  5. 5.29² =
  6. 6.11² =
  7. 7.16² =
  8. 8.25² =
  9. 9.13² =
  10. 10.24² =
  11. 11.22² =
  12. 12.17² =
  13. 13.23² =
  14. 14.28² =
  15. 15.14² =
  16. 16.27² =
  17. 17.21² =
  18. 18.26² =
  19. 19.13² =
  20. 20.24² =
  21. 21.21² =
  22. 22.15² =
  23. 23.27² =
  24. 24.13² =
  25. 25.13² =
  26. 26.18² =
  27. 27.22² =
  28. 28.12² =
  29. 29.26² =
  30. 30.26² =
  31. 31.26² =
  32. 32.11² =
  33. 33.12² =
  34. 34.29² =
  35. 35.28² =
  36. 36.21² =
  37. 37.22² =
  38. 38.17² =
  39. 39.21² =
  40. 40.21² =

Answer key

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

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