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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 725 · 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. 1.16² =
  2. 2.24² =
  3. 3.29² =
  4. 4.28² =
  5. 5.21² =
  6. 6.27² =
  7. 7.17² =
  8. 8.25² =
  9. 9.22² =
  10. 10.12² =
  11. 11.26² =
  12. 12.11² =
  13. 13.23² =
  14. 14.18² =
  15. 15.14² =
  16. 16.19² =
  17. 17.15² =
  18. 18.21² =
  19. 19.11² =
  20. 20.13² =
  21. 21.21² =
  22. 22.24² =
  23. 23.22² =
  24. 24.14² =
  25. 25.13² =
  26. 26.21² =
  27. 27.17² =
  28. 28.17² =
  29. 29.26² =
  30. 30.22² =
  31. 31.12² =
  32. 32.24² =
  33. 33.12² =
  34. 34.16² =
  35. 35.18² =
  36. 36.16² =
  37. 37.12² =
  38. 38.27² =
  39. 39.17² =
  40. 40.28² =

Answer key

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

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