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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 468 · 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. 1.19² =
  2. 2.13² =
  3. 3.28² =
  4. 4.11² =
  5. 5.26² =
  6. 6.22² =
  7. 7.18² =
  8. 8.23² =
  9. 9.15² =
  10. 10.17² =
  11. 11.12² =
  12. 12.21² =
  13. 13.14² =
  14. 14.29² =
  15. 15.25² =
  16. 16.27² =
  17. 17.16² =
  18. 18.24² =
  19. 19.27² =
  20. 20.13² =
  21. 21.12² =
  22. 22.21² =
  23. 23.13² =
  24. 24.23² =
  25. 25.12² =
  26. 26.12² =
  27. 27.16² =
  28. 28.15² =
  29. 29.26² =
  30. 30.19² =
  31. 31.21² =
  32. 32.15² =
  33. 33.14² =
  34. 34.11² =
  35. 35.25² =
  36. 36.28² =
  37. 37.27² =
  38. 38.15² =
  39. 39.28² =
  40. 40.21² =

Answer key

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

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