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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 536 · 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. 2.25² =
  3. 3.21² =
  4. 4.29² =
  5. 5.28² =
  6. 6.22² =
  7. 7.27² =
  8. 8.15² =
  9. 9.23² =
  10. 10.19² =
  11. 11.11² =
  12. 12.24² =
  13. 13.17² =
  14. 14.12² =
  15. 15.14² =
  16. 16.18² =
  17. 17.13² =
  18. 18.25² =
  19. 19.17² =
  20. 20.19² =
  21. 21.15² =
  22. 22.26² =
  23. 23.28² =
  24. 24.11² =
  25. 25.17² =
  26. 26.23² =
  27. 27.21² =
  28. 28.18² =
  29. 29.27² =
  30. 30.24² =
  31. 31.14² =
  32. 32.12² =
  33. 33.18² =
  34. 34.15² =
  35. 35.17² =
  36. 36.21² =
  37. 37.16² =
  38. 38.16² =
  39. 39.14² =
  40. 40.26² =

Answer key

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

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