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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 449 · 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. 2.19² =
  3. 3.16² =
  4. 4.27² =
  5. 5.14² =
  6. 6.25² =
  7. 7.26² =
  8. 8.21² =
  9. 9.23² =
  10. 10.24² =
  11. 11.28² =
  12. 12.13² =
  13. 13.29² =
  14. 14.11² =
  15. 15.12² =
  16. 16.15² =
  17. 17.18² =
  18. 18.17² =
  19. 19.25² =
  20. 20.18² =
  21. 21.14² =
  22. 22.11² =
  23. 23.13² =
  24. 24.16² =
  25. 25.23² =
  26. 26.19² =
  27. 27.21² =
  28. 28.29² =
  29. 29.23² =
  30. 30.23² =
  31. 31.17² =
  32. 32.21² =
  33. 33.25² =
  34. 34.11² =
  35. 35.12² =
  36. 36.16² =
  37. 37.11² =
  38. 38.28² =
  39. 39.21² =
  40. 40.15² =

Answer key

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

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