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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 424 · 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. 1.21² =
  2. 2.23² =
  3. 3.11² =
  4. 4.22² =
  5. 5.19² =
  6. 6.25² =
  7. 7.15² =
  8. 8.16² =
  9. 9.14² =
  10. 10.28² =
  11. 11.29² =
  12. 12.27² =
  13. 13.13² =
  14. 14.17² =
  15. 15.26² =
  16. 16.24² =
  17. 17.18² =
  18. 18.14² =
  19. 19.12² =
  20. 20.17² =
  21. 21.23² =
  22. 22.26² =
  23. 23.23² =
  24. 24.12² =
  25. 25.15² =
  26. 26.14² =
  27. 27.26² =
  28. 28.19² =
  29. 29.16² =
  30. 30.11² =
  31. 31.12² =
  32. 32.28² =
  33. 33.21² =
  34. 34.17² =
  35. 35.14² =
  36. 36.23² =
  37. 37.21² =
  38. 38.25² =
  39. 39.12² =
  40. 40.27² =

Answer key

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

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