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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 238 · 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. 1.19² =
  2. 2.26² =
  3. 3.18² =
  4. 4.22² =
  5. 5.17² =
  6. 6.13² =
  7. 7.27² =
  8. 8.15² =
  9. 9.25² =
  10. 10.21² =
  11. 11.23² =
  12. 12.14² =
  13. 13.16² =
  14. 14.12² =
  15. 15.11² =
  16. 16.28² =
  17. 17.29² =
  18. 18.24² =
  19. 19.12² =
  20. 20.28² =
  21. 21.17² =
  22. 22.25² =
  23. 23.21² =
  24. 24.24² =
  25. 25.15² =
  26. 26.11² =
  27. 27.28² =
  28. 28.15² =
  29. 29.25² =
  30. 30.21² =
  31. 31.23² =
  32. 32.13² =
  33. 33.21² =
  34. 34.15² =
  35. 35.14² =
  36. 36.21² =
  37. 37.21² =
  38. 38.19² =
  39. 39.23² =
  40. 40.21² =

Answer key

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

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