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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 801 · 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. 2.18² =
  3. 3.12² =
  4. 4.27² =
  5. 5.13² =
  6. 6.16² =
  7. 7.24² =
  8. 8.22² =
  9. 9.29² =
  10. 10.15² =
  11. 11.14² =
  12. 12.21² =
  13. 13.25² =
  14. 14.11² =
  15. 15.17² =
  16. 16.26² =
  17. 17.19² =
  18. 18.23² =
  19. 19.16² =
  20. 20.28² =
  21. 21.27² =
  22. 22.13² =
  23. 23.21² =
  24. 24.25² =
  25. 25.19² =
  26. 26.25² =
  27. 27.13² =
  28. 28.29² =
  29. 29.17² =
  30. 30.17² =
  31. 31.22² =
  32. 32.23² =
  33. 33.21² =
  34. 34.16² =
  35. 35.26² =
  36. 36.15² =
  37. 37.18² =
  38. 38.21² =
  39. 39.19² =
  40. 40.22² =

Answer key

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

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