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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 303 · 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. 2.24² =
  3. 3.27² =
  4. 4.21² =
  5. 5.16² =
  6. 6.29² =
  7. 7.28² =
  8. 8.17² =
  9. 9.19² =
  10. 10.11² =
  11. 11.25² =
  12. 12.13² =
  13. 13.22² =
  14. 14.23² =
  15. 15.15² =
  16. 16.26² =
  17. 17.22² =
  18. 18.12² =
  19. 19.14² =
  20. 20.14² =
  21. 21.21² =
  22. 22.12² =
  23. 23.24² =
  24. 24.25² =
  25. 25.25² =
  26. 26.14² =
  27. 27.28² =
  28. 28.16² =
  29. 29.24² =
  30. 30.27² =
  31. 31.12² =
  32. 32.18² =
  33. 33.21² =
  34. 34.21² =
  35. 35.15² =
  36. 36.25² =
  37. 37.23² =
  38. 38.11² =
  39. 39.21² =
  40. 40.28² =

Answer key

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

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