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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 484 · 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. 2.13² =
  3. 3.29² =
  4. 4.21² =
  5. 5.11² =
  6. 6.27² =
  7. 7.19² =
  8. 8.14² =
  9. 9.18² =
  10. 10.17² =
  11. 11.16² =
  12. 12.25² =
  13. 13.12² =
  14. 14.22² =
  15. 15.16² =
  16. 16.28² =
  17. 17.15² =
  18. 18.17² =
  19. 19.23² =
  20. 20.13² =
  21. 21.22² =
  22. 22.17² =
  23. 23.26² =
  24. 24.22² =
  25. 25.13² =
  26. 26.26² =
  27. 27.11² =
  28. 28.23² =
  29. 29.27² =
  30. 30.19² =
  31. 31.19² =
  32. 32.14² =
  33. 33.26² =
  34. 34.15² =
  35. 35.17² =
  36. 36.13² =
  37. 37.17² =
  38. 38.16² =
  39. 39.11² =
  40. 40.29² =

Answer key

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

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