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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 395 · 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. 3.28² =
  4. 4.29² =
  5. 5.23² =
  6. 6.15² =
  7. 7.19² =
  8. 8.22² =
  9. 9.17² =
  10. 10.25² =
  11. 11.26² =
  12. 12.21² =
  13. 13.27² =
  14. 14.18² =
  15. 15.12² =
  16. 16.11² =
  17. 17.13² =
  18. 18.21² =
  19. 19.23² =
  20. 20.21² =
  21. 21.14² =
  22. 22.24² =
  23. 23.26² =
  24. 24.27² =
  25. 25.22² =
  26. 26.17² =
  27. 27.15² =
  28. 28.13² =
  29. 29.21² =
  30. 30.24² =
  31. 31.25² =
  32. 32.22² =
  33. 33.11² =
  34. 34.27² =
  35. 35.22² =
  36. 36.12² =
  37. 37.13² =
  38. 38.18² =
  39. 39.11² =
  40. 40.18² =

Answer key

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

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