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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 601 · 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. 1.22² =
  2. 2.29² =
  3. 3.25² =
  4. 4.15² =
  5. 5.27² =
  6. 6.16² =
  7. 7.19² =
  8. 8.21² =
  9. 9.17² =
  10. 10.13² =
  11. 11.28² =
  12. 12.18² =
  13. 13.26² =
  14. 14.12² =
  15. 15.14² =
  16. 16.11² =
  17. 17.29² =
  18. 18.24² =
  19. 19.23² =
  20. 20.28² =
  21. 21.21² =
  22. 22.22² =
  23. 23.11² =
  24. 24.11² =
  25. 25.13² =
  26. 26.14² =
  27. 27.12² =
  28. 28.25² =
  29. 29.14² =
  30. 30.27² =
  31. 31.14² =
  32. 32.15² =
  33. 33.21² =
  34. 34.25² =
  35. 35.15² =
  36. 36.26² =
  37. 37.24² =
  38. 38.15² =
  39. 39.28² =
  40. 40.21² =

Answer key

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

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