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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 263 · 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. 2.17² =
  3. 3.15² =
  4. 4.11² =
  5. 5.18² =
  6. 6.21² =
  7. 7.22² =
  8. 8.16² =
  9. 9.26² =
  10. 10.23² =
  11. 11.14² =
  12. 12.25² =
  13. 13.29² =
  14. 14.27² =
  15. 15.13² =
  16. 16.18² =
  17. 17.12² =
  18. 18.28² =
  19. 19.15² =
  20. 20.24² =
  21. 21.24² =
  22. 22.21² =
  23. 23.26² =
  24. 24.13² =
  25. 25.28² =
  26. 26.19² =
  27. 27.15² =
  28. 28.21² =
  29. 29.28² =
  30. 30.18² =
  31. 31.13² =
  32. 32.19² =
  33. 33.18² =
  34. 34.18² =
  35. 35.21² =
  36. 36.26² =
  37. 37.21² =
  38. 38.25² =
  39. 39.24² =
  40. 40.17² =

Answer key

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

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