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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 288 · 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. 1.23² =
  2. 2.29² =
  3. 3.18² =
  4. 4.27² =
  5. 5.11² =
  6. 6.14² =
  7. 7.17² =
  8. 8.15² =
  9. 9.19² =
  10. 10.16² =
  11. 11.24² =
  12. 12.25² =
  13. 13.22² =
  14. 14.12² =
  15. 15.26² =
  16. 16.13² =
  17. 17.28² =
  18. 18.21² =
  19. 19.21² =
  20. 20.11² =
  21. 21.25² =
  22. 22.16² =
  23. 23.22² =
  24. 24.21² =
  25. 25.27² =
  26. 26.17² =
  27. 27.25² =
  28. 28.19² =
  29. 29.27² =
  30. 30.22² =
  31. 31.29² =
  32. 32.23² =
  33. 33.18² =
  34. 34.28² =
  35. 35.17² =
  36. 36.15² =
  37. 37.22² =
  38. 38.17² =
  39. 39.21² =
  40. 40.21² =

Answer key

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

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