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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 372 · 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. 1.15² =
  2. 2.16² =
  3. 3.23² =
  4. 4.22² =
  5. 5.14² =
  6. 6.13² =
  7. 7.17² =
  8. 8.11² =
  9. 9.19² =
  10. 10.27² =
  11. 11.21² =
  12. 12.18² =
  13. 13.26² =
  14. 14.12² =
  15. 15.24² =
  16. 16.25² =
  17. 17.28² =
  18. 18.29² =
  19. 19.12² =
  20. 20.28² =
  21. 21.12² =
  22. 22.18² =
  23. 23.28² =
  24. 24.13² =
  25. 25.13² =
  26. 26.24² =
  27. 27.11² =
  28. 28.27² =
  29. 29.15² =
  30. 30.15² =
  31. 31.25² =
  32. 32.23² =
  33. 33.21² =
  34. 34.21² =
  35. 35.21² =
  36. 36.28² =
  37. 37.11² =
  38. 38.25² =
  39. 39.11² =
  40. 40.27² =

Answer key

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

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