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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 458 · 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. 2.12² =
  3. 3.25² =
  4. 4.27² =
  5. 5.21² =
  6. 6.28² =
  7. 7.19² =
  8. 8.29² =
  9. 9.23² =
  10. 10.24² =
  11. 11.22² =
  12. 12.16² =
  13. 13.13² =
  14. 14.14² =
  15. 15.11² =
  16. 16.17² =
  17. 17.18² =
  18. 18.21² =
  19. 19.21² =
  20. 20.26² =
  21. 21.12² =
  22. 22.11² =
  23. 23.21² =
  24. 24.28² =
  25. 25.12² =
  26. 26.21² =
  27. 27.12² =
  28. 28.21² =
  29. 29.21² =
  30. 30.12² =
  31. 31.13² =
  32. 32.17² =
  33. 33.28² =
  34. 34.27² =
  35. 35.11² =
  36. 36.28² =
  37. 37.14² =
  38. 38.23² =
  39. 39.25² =
  40. 40.21² =

Answer key

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

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