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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 455 · 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. 1.18² =
  2. 2.19² =
  3. 3.22² =
  4. 4.13² =
  5. 5.14² =
  6. 6.12² =
  7. 7.17² =
  8. 8.24² =
  9. 9.28² =
  10. 10.16² =
  11. 11.29² =
  12. 12.25² =
  13. 13.15² =
  14. 14.23² =
  15. 15.27² =
  16. 16.26² =
  17. 17.21² =
  18. 18.11² =
  19. 19.13² =
  20. 20.14² =
  21. 21.22² =
  22. 22.21² =
  23. 23.21² =
  24. 24.13² =
  25. 25.29² =
  26. 26.11² =
  27. 27.25² =
  28. 28.22² =
  29. 29.21² =
  30. 30.21² =
  31. 31.14² =
  32. 32.25² =
  33. 33.16² =
  34. 34.23² =
  35. 35.17² =
  36. 36.22² =
  37. 37.26² =
  38. 38.18² =
  39. 39.15² =
  40. 40.27² =

Answer key

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

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