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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 462 · 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. 3.16² =
  4. 4.19² =
  5. 5.27² =
  6. 6.15² =
  7. 7.21² =
  8. 8.11² =
  9. 9.23² =
  10. 10.12² =
  11. 11.17² =
  12. 12.13² =
  13. 13.25² =
  14. 14.22² =
  15. 15.18² =
  16. 16.29² =
  17. 17.28² =
  18. 18.12² =
  19. 19.23² =
  20. 20.14² =
  21. 21.11² =
  22. 22.26² =
  23. 23.19² =
  24. 24.14² =
  25. 25.12² =
  26. 26.23² =
  27. 27.23² =
  28. 28.14² =
  29. 29.21² =
  30. 30.24² =
  31. 31.26² =
  32. 32.29² =
  33. 33.11² =
  34. 34.17² =
  35. 35.15² =
  36. 36.16² =
  37. 37.13² =
  38. 38.12² =
  39. 39.27² =
  40. 40.15² =

Answer key

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

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