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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 764 · 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. 3.11² =
  4. 4.26² =
  5. 5.27² =
  6. 6.29² =
  7. 7.21² =
  8. 8.25² =
  9. 9.13² =
  10. 10.23² =
  11. 11.15² =
  12. 12.22² =
  13. 13.19² =
  14. 14.24² =
  15. 15.28² =
  16. 16.14² =
  17. 17.16² =
  18. 18.17² =
  19. 19.21² =
  20. 20.23² =
  21. 21.12² =
  22. 22.21² =
  23. 23.11² =
  24. 24.24² =
  25. 25.23² =
  26. 26.21² =
  27. 27.16² =
  28. 28.27² =
  29. 29.18² =
  30. 30.23² =
  31. 31.22² =
  32. 32.15² =
  33. 33.21² =
  34. 34.11² =
  35. 35.19² =
  36. 36.22² =
  37. 37.18² =
  38. 38.29² =
  39. 39.15² =
  40. 40.21² =

Answer key

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

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