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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 391 · 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. 1.24² =
  2. 2.19² =
  3. 3.11² =
  4. 4.21² =
  5. 5.14² =
  6. 6.17² =
  7. 7.22² =
  8. 8.26² =
  9. 9.18² =
  10. 10.16² =
  11. 11.15² =
  12. 12.12² =
  13. 13.29² =
  14. 14.23² =
  15. 15.28² =
  16. 16.19² =
  17. 17.25² =
  18. 18.21² =
  19. 19.13² =
  20. 20.27² =
  21. 21.29² =
  22. 22.25² =
  23. 23.27² =
  24. 24.22² =
  25. 25.27² =
  26. 26.16² =
  27. 27.21² =
  28. 28.13² =
  29. 29.17² =
  30. 30.26² =
  31. 31.18² =
  32. 32.11² =
  33. 33.18² =
  34. 34.17² =
  35. 35.22² =
  36. 36.15² =
  37. 37.19² =
  38. 38.13² =
  39. 39.18² =
  40. 40.17² =

Answer key

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

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