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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 243 · 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. 1.25² =
  2. 2.19² =
  3. 3.15² =
  4. 4.22² =
  5. 5.26² =
  6. 6.21² =
  7. 7.28² =
  8. 8.17² =
  9. 9.11² =
  10. 10.14² =
  11. 11.12² =
  12. 12.16² =
  13. 13.24² =
  14. 14.29² =
  15. 15.23² =
  16. 16.13² =
  17. 17.21² =
  18. 18.24² =
  19. 19.27² =
  20. 20.24² =
  21. 21.26² =
  22. 22.18² =
  23. 23.14² =
  24. 24.17² =
  25. 25.12² =
  26. 26.15² =
  27. 27.19² =
  28. 28.21² =
  29. 29.13² =
  30. 30.21² =
  31. 31.27² =
  32. 32.18² =
  33. 33.14² =
  34. 34.22² =
  35. 35.17² =
  36. 36.12² =
  37. 37.25² =
  38. 38.19² =
  39. 39.23² =
  40. 40.23² =

Answer key

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

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