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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 234 · 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. 2.11² =
  3. 3.21² =
  4. 4.15² =
  5. 5.26² =
  6. 6.12² =
  7. 7.18² =
  8. 8.28² =
  9. 9.25² =
  10. 10.19² =
  11. 11.29² =
  12. 12.16² =
  13. 13.27² =
  14. 14.13² =
  15. 15.23² =
  16. 16.14² =
  17. 17.22² =
  18. 18.12² =
  19. 19.17² =
  20. 20.16² =
  21. 21.11² =
  22. 22.12² =
  23. 23.22² =
  24. 24.15² =
  25. 25.12² =
  26. 26.16² =
  27. 27.18² =
  28. 28.12² =
  29. 29.18² =
  30. 30.23² =
  31. 31.21² =
  32. 32.28² =
  33. 33.29² =
  34. 34.14² =
  35. 35.23² =
  36. 36.12² =
  37. 37.28² =
  38. 38.12² =
  39. 39.12² =
  40. 40.21² =

Answer key

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

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