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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 434 · 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. 1.15² =
  2. 2.22² =
  3. 3.27² =
  4. 4.13² =
  5. 5.12² =
  6. 6.11² =
  7. 7.23² =
  8. 8.18² =
  9. 9.17² =
  10. 10.25² =
  11. 11.14² =
  12. 12.21² =
  13. 13.24² =
  14. 14.29² =
  15. 15.26² =
  16. 16.19² =
  17. 17.16² =
  18. 18.28² =
  19. 19.16² =
  20. 20.21² =
  21. 21.12² =
  22. 22.26² =
  23. 23.27² =
  24. 24.16² =
  25. 25.26² =
  26. 26.15² =
  27. 27.24² =
  28. 28.28² =
  29. 29.15² =
  30. 30.17² =
  31. 31.14² =
  32. 32.14² =
  33. 33.19² =
  34. 34.21² =
  35. 35.14² =
  36. 36.26² =
  37. 37.22² =
  38. 38.19² =
  39. 39.26² =
  40. 40.19² =

Answer key

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

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