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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 527 · 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. 1.28² =
  2. 2.29² =
  3. 3.14² =
  4. 4.13² =
  5. 5.23² =
  6. 6.19² =
  7. 7.12² =
  8. 8.21² =
  9. 9.11² =
  10. 10.26² =
  11. 11.15² =
  12. 12.16² =
  13. 13.18² =
  14. 14.17² =
  15. 15.27² =
  16. 16.13² =
  17. 17.22² =
  18. 18.24² =
  19. 19.12² =
  20. 20.25² =
  21. 21.25² =
  22. 22.13² =
  23. 23.22² =
  24. 24.12² =
  25. 25.27² =
  26. 26.26² =
  27. 27.15² =
  28. 28.25² =
  29. 29.25² =
  30. 30.19² =
  31. 31.29² =
  32. 32.23² =
  33. 33.26² =
  34. 34.21² =
  35. 35.25² =
  36. 36.12² =
  37. 37.29² =
  38. 38.14² =
  39. 39.15² =
  40. 40.14² =

Answer key

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

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