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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 459 · 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. 1.18² =
  2. 2.24² =
  3. 3.12² =
  4. 4.22² =
  5. 5.16² =
  6. 6.17² =
  7. 7.15² =
  8. 8.21² =
  9. 9.13² =
  10. 10.19² =
  11. 11.29² =
  12. 12.11² =
  13. 13.26² =
  14. 14.27² =
  15. 15.25² =
  16. 16.14² =
  17. 17.23² =
  18. 18.28² =
  19. 19.21² =
  20. 20.18² =
  21. 21.19² =
  22. 22.14² =
  23. 23.23² =
  24. 24.21² =
  25. 25.21² =
  26. 26.28² =
  27. 27.12² =
  28. 28.16² =
  29. 29.13² =
  30. 30.15² =
  31. 31.24² =
  32. 32.11² =
  33. 33.26² =
  34. 34.21² =
  35. 35.19² =
  36. 36.12² =
  37. 37.24² =
  38. 38.14² =
  39. 39.12² =
  40. 40.15² =

Answer key

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

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