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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 574 · 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. 2.16² =
  3. 3.27² =
  4. 4.29² =
  5. 5.26² =
  6. 6.25² =
  7. 7.28² =
  8. 8.15² =
  9. 9.13² =
  10. 10.12² =
  11. 11.21² =
  12. 12.22² =
  13. 13.17² =
  14. 14.14² =
  15. 15.23² =
  16. 16.24² =
  17. 17.18² =
  18. 18.11² =
  19. 19.15² =
  20. 20.12² =
  21. 21.19² =
  22. 22.13² =
  23. 23.18² =
  24. 24.17² =
  25. 25.12² =
  26. 26.14² =
  27. 27.18² =
  28. 28.25² =
  29. 29.14² =
  30. 30.17² =
  31. 31.17² =
  32. 32.27² =
  33. 33.27² =
  34. 34.24² =
  35. 35.13² =
  36. 36.13² =
  37. 37.15² =
  38. 38.12² =
  39. 39.21² =
  40. 40.21² =

Answer key

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

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