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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 675 · 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. 1.12² =
  2. 2.22² =
  3. 3.14² =
  4. 4.18² =
  5. 5.21² =
  6. 6.28² =
  7. 7.23² =
  8. 8.24² =
  9. 9.25² =
  10. 10.16² =
  11. 11.11² =
  12. 12.19² =
  13. 13.29² =
  14. 14.27² =
  15. 15.13² =
  16. 16.17² =
  17. 17.22² =
  18. 18.26² =
  19. 19.17² =
  20. 20.27² =
  21. 21.23² =
  22. 22.15² =
  23. 23.28² =
  24. 24.14² =
  25. 25.12² =
  26. 26.12² =
  27. 27.28² =
  28. 28.28² =
  29. 29.15² =
  30. 30.15² =
  31. 31.28² =
  32. 32.28² =
  33. 33.21² =
  34. 34.13² =
  35. 35.16² =
  36. 36.15² =
  37. 37.25² =
  38. 38.16² =
  39. 39.12² =
  40. 40.21² =

Answer key

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

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