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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 531 · 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. 1.27² =
  2. 2.19² =
  3. 3.23² =
  4. 4.16² =
  5. 5.26² =
  6. 6.28² =
  7. 7.13² =
  8. 8.18² =
  9. 9.22² =
  10. 10.24² =
  11. 11.25² =
  12. 12.12² =
  13. 13.21² =
  14. 14.11² =
  15. 15.29² =
  16. 16.14² =
  17. 17.17² =
  18. 18.22² =
  19. 19.15² =
  20. 20.25² =
  21. 21.11² =
  22. 22.26² =
  23. 23.24² =
  24. 24.21² =
  25. 25.17² =
  26. 26.16² =
  27. 27.25² =
  28. 28.21² =
  29. 29.12² =
  30. 30.22² =
  31. 31.19² =
  32. 32.12² =
  33. 33.13² =
  34. 34.19² =
  35. 35.13² =
  36. 36.28² =
  37. 37.19² =
  38. 38.12² =
  39. 39.26² =
  40. 40.11² =

Answer key

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

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