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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 533 · 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. 1.27² =
  2. 2.19² =
  3. 3.12² =
  4. 4.14² =
  5. 5.24² =
  6. 6.15² =
  7. 7.18² =
  8. 8.25² =
  9. 9.22² =
  10. 10.21² =
  11. 11.17² =
  12. 12.16² =
  13. 13.26² =
  14. 14.11² =
  15. 15.28² =
  16. 16.13² =
  17. 17.24² =
  18. 18.23² =
  19. 19.12² =
  20. 20.18² =
  21. 21.17² =
  22. 22.29² =
  23. 23.26² =
  24. 24.28² =
  25. 25.28² =
  26. 26.11² =
  27. 27.22² =
  28. 28.24² =
  29. 29.12² =
  30. 30.17² =
  31. 31.13² =
  32. 32.19² =
  33. 33.29² =
  34. 34.18² =
  35. 35.25² =
  36. 36.26² =
  37. 37.21² =
  38. 38.11² =
  39. 39.18² =
  40. 40.28² =

Answer key

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

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