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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 393 · 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. 1.29² =
  2. 2.14² =
  3. 3.21² =
  4. 4.18² =
  5. 5.27² =
  6. 6.19² =
  7. 7.24² =
  8. 8.17² =
  9. 9.13² =
  10. 10.11² =
  11. 11.15² =
  12. 12.23² =
  13. 13.22² =
  14. 14.25² =
  15. 15.26² =
  16. 16.12² =
  17. 17.16² =
  18. 18.15² =
  19. 19.11² =
  20. 20.25² =
  21. 21.23² =
  22. 22.13² =
  23. 23.12² =
  24. 24.28² =
  25. 25.14² =
  26. 26.21² =
  27. 27.18² =
  28. 28.16² =
  29. 29.18² =
  30. 30.16² =
  31. 31.13² =
  32. 32.15² =
  33. 33.16² =
  34. 34.21² =
  35. 35.15² =
  36. 36.29² =
  37. 37.25² =
  38. 38.21² =
  39. 39.24² =
  40. 40.12² =

Answer key

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

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