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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 547 · 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. 2.26² =
  3. 3.22² =
  4. 4.18² =
  5. 5.25² =
  6. 6.15² =
  7. 7.12² =
  8. 8.19² =
  9. 9.27² =
  10. 10.21² =
  11. 11.11² =
  12. 12.14² =
  13. 13.29² =
  14. 14.16² =
  15. 15.28² =
  16. 16.13² =
  17. 17.23² =
  18. 18.17² =
  19. 19.11² =
  20. 20.26² =
  21. 21.26² =
  22. 22.29² =
  23. 23.28² =
  24. 24.24² =
  25. 25.24² =
  26. 26.21² =
  27. 27.12² =
  28. 28.25² =
  29. 29.11² =
  30. 30.24² =
  31. 31.21² =
  32. 32.17² =
  33. 33.24² =
  34. 34.18² =
  35. 35.11² =
  36. 36.21² =
  37. 37.28² =
  38. 38.16² =
  39. 39.21² =
  40. 40.17² =

Answer key

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

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