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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 60 · 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. 1.24² =
  2. 2.14² =
  3. 3.27² =
  4. 4.21² =
  5. 5.17² =
  6. 6.12² =
  7. 7.29² =
  8. 8.26² =
  9. 9.25² =
  10. 10.18² =
  11. 11.11² =
  12. 12.16² =
  13. 13.19² =
  14. 14.13² =
  15. 15.13² =
  16. 16.15² =
  17. 17.22² =
  18. 18.28² =
  19. 19.23² =
  20. 20.16² =
  21. 21.21² =
  22. 22.27² =
  23. 23.23² =
  24. 24.17² =
  25. 25.22² =
  26. 26.17² =
  27. 27.22² =
  28. 28.17² =
  29. 29.26² =
  30. 30.13² =
  31. 31.26² =
  32. 32.22² =
  33. 33.25² =
  34. 34.16² =
  35. 35.15² =
  36. 36.15² =
  37. 37.11² =
  38. 38.14² =
  39. 39.22² =
  40. 40.21² =

Answer key

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

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