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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 452 · 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. 2.16² =
  3. 3.21² =
  4. 4.13² =
  5. 5.11² =
  6. 6.24² =
  7. 7.22² =
  8. 8.19² =
  9. 9.28² =
  10. 10.18² =
  11. 11.25² =
  12. 12.14² =
  13. 13.23² =
  14. 14.12² =
  15. 15.15² =
  16. 16.26² =
  17. 17.29² =
  18. 18.21² =
  19. 19.27² =
  20. 20.16² =
  21. 21.25² =
  22. 22.19² =
  23. 23.26² =
  24. 24.25² =
  25. 25.12² =
  26. 26.28² =
  27. 27.29² =
  28. 28.26² =
  29. 29.29² =
  30. 30.28² =
  31. 31.28² =
  32. 32.24² =
  33. 33.25² =
  34. 34.18² =
  35. 35.13² =
  36. 36.11² =
  37. 37.23² =
  38. 38.13² =
  39. 39.16² =
  40. 40.15² =

Answer key

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

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