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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 564 · 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. 1.25² =
  2. 2.24² =
  3. 3.14² =
  4. 4.23² =
  5. 5.12² =
  6. 6.11² =
  7. 7.19² =
  8. 8.29² =
  9. 9.28² =
  10. 10.18² =
  11. 11.15² =
  12. 12.21² =
  13. 13.13² =
  14. 14.22² =
  15. 15.17² =
  16. 16.26² =
  17. 17.24² =
  18. 18.16² =
  19. 19.21² =
  20. 20.17² =
  21. 21.27² =
  22. 22.29² =
  23. 23.21² =
  24. 24.15² =
  25. 25.12² =
  26. 26.16² =
  27. 27.28² =
  28. 28.26² =
  29. 29.23² =
  30. 30.25² =
  31. 31.24² =
  32. 32.28² =
  33. 33.29² =
  34. 34.27² =
  35. 35.15² =
  36. 36.23² =
  37. 37.17² =
  38. 38.12² =
  39. 39.13² =
  40. 40.13² =

Answer key

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

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