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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 630 · 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. 1.13² =
  2. 2.24² =
  3. 3.22² =
  4. 4.21² =
  5. 5.27² =
  6. 6.15² =
  7. 7.25² =
  8. 8.29² =
  9. 9.12² =
  10. 10.23² =
  11. 11.19² =
  12. 12.16² =
  13. 13.18² =
  14. 14.17² =
  15. 15.11² =
  16. 16.14² =
  17. 17.23² =
  18. 18.16² =
  19. 19.27² =
  20. 20.28² =
  21. 21.27² =
  22. 22.26² =
  23. 23.21² =
  24. 24.12² =
  25. 25.21² =
  26. 26.26² =
  27. 27.26² =
  28. 28.15² =
  29. 29.23² =
  30. 30.26² =
  31. 31.25² =
  32. 32.22² =
  33. 33.13² =
  34. 34.21² =
  35. 35.17² =
  36. 36.27² =
  37. 37.27² =
  38. 38.28² =
  39. 39.27² =
  40. 40.18² =

Answer key

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

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