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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 375 · 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. 2.13² =
  3. 3.15² =
  4. 4.22² =
  5. 5.29² =
  6. 6.17² =
  7. 7.23² =
  8. 8.11² =
  9. 9.27² =
  10. 10.21² =
  11. 11.16² =
  12. 12.14² =
  13. 13.12² =
  14. 14.25² =
  15. 15.26² =
  16. 16.28² =
  17. 17.18² =
  18. 18.24² =
  19. 19.22² =
  20. 20.19² =
  21. 21.21² =
  22. 22.21² =
  23. 23.11² =
  24. 24.24² =
  25. 25.27² =
  26. 26.16² =
  27. 27.24² =
  28. 28.15² =
  29. 29.29² =
  30. 30.21² =
  31. 31.12² =
  32. 32.28² =
  33. 33.12² =
  34. 34.12² =
  35. 35.11² =
  36. 36.19² =
  37. 37.14² =
  38. 38.21² =
  39. 39.12² =
  40. 40.21² =

Answer key

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

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