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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 666 · 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. 1.26² =
  2. 2.27² =
  3. 3.29² =
  4. 4.18² =
  5. 5.21² =
  6. 6.19² =
  7. 7.17² =
  8. 8.22² =
  9. 9.16² =
  10. 10.14² =
  11. 11.24² =
  12. 12.13² =
  13. 13.28² =
  14. 14.11² =
  15. 15.25² =
  16. 16.27² =
  17. 17.23² =
  18. 18.12² =
  19. 19.15² =
  20. 20.25² =
  21. 21.11² =
  22. 22.29² =
  23. 23.21² =
  24. 24.22² =
  25. 25.25² =
  26. 26.21² =
  27. 27.24² =
  28. 28.28² =
  29. 29.27² =
  30. 30.21² =
  31. 31.28² =
  32. 32.29² =
  33. 33.18² =
  34. 34.23² =
  35. 35.21² =
  36. 36.12² =
  37. 37.23² =
  38. 38.25² =
  39. 39.26² =
  40. 40.18² =

Answer key

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

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