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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 2 · 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. 1.17² =
  2. 2.29² =
  3. 3.22² =
  4. 4.16² =
  5. 5.25² =
  6. 6.26² =
  7. 7.13² =
  8. 8.11² =
  9. 9.24² =
  10. 10.28² =
  11. 11.12² =
  12. 12.23² =
  13. 13.19² =
  14. 14.14² =
  15. 15.21² =
  16. 16.27² =
  17. 17.15² =
  18. 18.15² =
  19. 19.18² =
  20. 20.17² =
  21. 21.21² =
  22. 22.15² =
  23. 23.12² =
  24. 24.17² =
  25. 25.13² =
  26. 26.28² =
  27. 27.26² =
  28. 28.17² =
  29. 29.14² =
  30. 30.15² =
  31. 31.26² =
  32. 32.19² =
  33. 33.16² =
  34. 34.23² =
  35. 35.12² =
  36. 36.12² =
  37. 37.16² =
  38. 38.19² =
  39. 39.13² =
  40. 40.15² =

Answer key

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

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