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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 348 · 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. 1.15² =
  2. 2.24² =
  3. 3.11² =
  4. 4.18² =
  5. 5.27² =
  6. 6.25² =
  7. 7.16² =
  8. 8.29² =
  9. 9.19² =
  10. 10.14² =
  11. 11.17² =
  12. 12.12² =
  13. 13.28² =
  14. 14.21² =
  15. 15.23² =
  16. 16.26² =
  17. 17.13² =
  18. 18.15² =
  19. 19.12² =
  20. 20.14² =
  21. 21.12² =
  22. 22.27² =
  23. 23.15² =
  24. 24.22² =
  25. 25.16² =
  26. 26.18² =
  27. 27.11² =
  28. 28.29² =
  29. 29.14² =
  30. 30.22² =
  31. 31.29² =
  32. 32.17² =
  33. 33.16² =
  34. 34.16² =
  35. 35.18² =
  36. 36.24² =
  37. 37.12² =
  38. 38.19² =
  39. 39.16² =
  40. 40.14² =

Answer key

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

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