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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 265 · 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. 1.24² =
  2. 2.15² =
  3. 3.12² =
  4. 4.29² =
  5. 5.27² =
  6. 6.16² =
  7. 7.21² =
  8. 8.25² =
  9. 9.14² =
  10. 10.13² =
  11. 11.23² =
  12. 12.26² =
  13. 13.17² =
  14. 14.11² =
  15. 15.28² =
  16. 16.18² =
  17. 17.25² =
  18. 18.19² =
  19. 19.22² =
  20. 20.18² =
  21. 21.17² =
  22. 22.29² =
  23. 23.15² =
  24. 24.16² =
  25. 25.29² =
  26. 26.16² =
  27. 27.19² =
  28. 28.19² =
  29. 29.29² =
  30. 30.12² =
  31. 31.11² =
  32. 32.17² =
  33. 33.23² =
  34. 34.17² =
  35. 35.11² =
  36. 36.25² =
  37. 37.17² =
  38. 38.24² =
  39. 39.25² =
  40. 40.23² =

Answer key

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

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