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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 569 · 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. 1.16² =
  2. 2.25² =
  3. 3.22² =
  4. 4.14² =
  5. 5.21² =
  6. 6.27² =
  7. 7.12² =
  8. 8.24² =
  9. 9.28² =
  10. 10.26² =
  11. 11.15² =
  12. 12.29² =
  13. 13.11² =
  14. 14.23² =
  15. 15.18² =
  16. 16.17² =
  17. 17.19² =
  18. 18.13² =
  19. 19.24² =
  20. 20.18² =
  21. 21.27² =
  22. 22.25² =
  23. 23.21² =
  24. 24.14² =
  25. 25.28² =
  26. 26.13² =
  27. 27.26² =
  28. 28.23² =
  29. 29.28² =
  30. 30.23² =
  31. 31.21² =
  32. 32.14² =
  33. 33.16² =
  34. 34.15² =
  35. 35.21² =
  36. 36.27² =
  37. 37.12² =
  38. 38.14² =
  39. 39.21² =
  40. 40.12² =

Answer key

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

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