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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 819 · 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. 2.25² =
  3. 3.19² =
  4. 4.28² =
  5. 5.21² =
  6. 6.22² =
  7. 7.11² =
  8. 8.24² =
  9. 9.12² =
  10. 10.26² =
  11. 11.27² =
  12. 12.16² =
  13. 13.17² =
  14. 14.13² =
  15. 15.15² =
  16. 16.29² =
  17. 17.14² =
  18. 18.11² =
  19. 19.14² =
  20. 20.23² =
  21. 21.16² =
  22. 22.13² =
  23. 23.27² =
  24. 24.13² =
  25. 25.23² =
  26. 26.21² =
  27. 27.25² =
  28. 28.28² =
  29. 29.28² =
  30. 30.13² =
  31. 31.21² =
  32. 32.13² =
  33. 33.13² =
  34. 34.19² =
  35. 35.23² =
  36. 36.18² =
  37. 37.25² =
  38. 38.14² =
  39. 39.21² =
  40. 40.26² =

Answer key

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

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