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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 483 · 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. 2.14² =
  3. 3.24² =
  4. 4.22² =
  5. 5.26² =
  6. 6.21² =
  7. 7.11² =
  8. 8.18² =
  9. 9.23² =
  10. 10.12² =
  11. 11.25² =
  12. 12.19² =
  13. 13.28² =
  14. 14.29² =
  15. 15.13² =
  16. 16.15² =
  17. 17.17² =
  18. 18.21² =
  19. 19.25² =
  20. 20.27² =
  21. 21.28² =
  22. 22.15² =
  23. 23.12² =
  24. 24.23² =
  25. 25.13² =
  26. 26.28² =
  27. 27.16² =
  28. 28.27² =
  29. 29.22² =
  30. 30.12² =
  31. 31.11² =
  32. 32.19² =
  33. 33.21² =
  34. 34.28² =
  35. 35.17² =
  36. 36.28² =
  37. 37.12² =
  38. 38.19² =
  39. 39.21² =
  40. 40.25² =

Answer key

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

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