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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 252 · 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. 2.12² =
  3. 3.15² =
  4. 4.17² =
  5. 5.19² =
  6. 6.21² =
  7. 7.14² =
  8. 8.22² =
  9. 9.27² =
  10. 10.28² =
  11. 11.16² =
  12. 12.25² =
  13. 13.29² =
  14. 14.23² =
  15. 15.24² =
  16. 16.26² =
  17. 17.11² =
  18. 18.13² =
  19. 19.28² =
  20. 20.25² =
  21. 21.11² =
  22. 22.16² =
  23. 23.16² =
  24. 24.21² =
  25. 25.19² =
  26. 26.19² =
  27. 27.22² =
  28. 28.16² =
  29. 29.27² =
  30. 30.17² =
  31. 31.21² =
  32. 32.12² =
  33. 33.17² =
  34. 34.26² =
  35. 35.28² =
  36. 36.27² =
  37. 37.13² =
  38. 38.28² =
  39. 39.11² =
  40. 40.29² =

Answer key

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

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