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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 508 · 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. 1.11² =
  2. 2.27² =
  3. 3.17² =
  4. 4.12² =
  5. 5.28² =
  6. 6.23² =
  7. 7.19² =
  8. 8.25² =
  9. 9.29² =
  10. 10.13² =
  11. 11.14² =
  12. 12.16² =
  13. 13.18² =
  14. 14.24² =
  15. 15.22² =
  16. 16.21² =
  17. 17.26² =
  18. 18.18² =
  19. 19.12² =
  20. 20.29² =
  21. 21.24² =
  22. 22.11² =
  23. 23.17² =
  24. 24.15² =
  25. 25.16² =
  26. 26.21² =
  27. 27.22² =
  28. 28.21² =
  29. 29.13² =
  30. 30.22² =
  31. 31.14² =
  32. 32.29² =
  33. 33.26² =
  34. 34.25² =
  35. 35.24² =
  36. 36.24² =
  37. 37.25² =
  38. 38.13² =
  39. 39.18² =
  40. 40.14² =

Answer key

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

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