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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 451 · 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. 1.23² =
  2. 2.29² =
  3. 3.28² =
  4. 4.12² =
  5. 5.26² =
  6. 6.18² =
  7. 7.24² =
  8. 8.14² =
  9. 9.15² =
  10. 10.21² =
  11. 11.22² =
  12. 12.13² =
  13. 13.25² =
  14. 14.11² =
  15. 15.16² =
  16. 16.12² =
  17. 17.17² =
  18. 18.19² =
  19. 19.27² =
  20. 20.17² =
  21. 21.17² =
  22. 22.25² =
  23. 23.23² =
  24. 24.21² =
  25. 25.11² =
  26. 26.18² =
  27. 27.24² =
  28. 28.27² =
  29. 29.16² =
  30. 30.27² =
  31. 31.21² =
  32. 32.28² =
  33. 33.21² =
  34. 34.22² =
  35. 35.21² =
  36. 36.11² =
  37. 37.28² =
  38. 38.15² =
  39. 39.11² =
  40. 40.21² =

Answer key

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

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