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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 273 · 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. 1.23² =
  2. 2.26² =
  3. 3.29² =
  4. 4.21² =
  5. 5.14² =
  6. 6.16² =
  7. 7.24² =
  8. 8.15² =
  9. 9.13² =
  10. 10.28² =
  11. 11.11² =
  12. 12.12² =
  13. 13.17² =
  14. 14.19² =
  15. 15.22² =
  16. 16.21² =
  17. 17.25² =
  18. 18.18² =
  19. 19.29² =
  20. 20.27² =
  21. 21.11² =
  22. 22.15² =
  23. 23.25² =
  24. 24.21² =
  25. 25.27² =
  26. 26.15² =
  27. 27.21² =
  28. 28.16² =
  29. 29.22² =
  30. 30.23² =
  31. 31.21² =
  32. 32.13² =
  33. 33.22² =
  34. 34.21² =
  35. 35.15² =
  36. 36.21² =
  37. 37.26² =
  38. 38.18² =
  39. 39.26² =
  40. 40.17² =

Answer key

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

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