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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 662 · 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. 2.17² =
  3. 3.21² =
  4. 4.11² =
  5. 5.12² =
  6. 6.27² =
  7. 7.18² =
  8. 8.15² =
  9. 9.13² =
  10. 10.28² =
  11. 11.25² =
  12. 12.19² =
  13. 13.14² =
  14. 14.24² =
  15. 15.23² =
  16. 16.22² =
  17. 17.22² =
  18. 18.26² =
  19. 19.23² =
  20. 20.14² =
  21. 21.29² =
  22. 22.11² =
  23. 23.29² =
  24. 24.23² =
  25. 25.25² =
  26. 26.15² =
  27. 27.21² =
  28. 28.11² =
  29. 29.25² =
  30. 30.26² =
  31. 31.21² =
  32. 32.17² =
  33. 33.26² =
  34. 34.13² =
  35. 35.28² =
  36. 36.16² =
  37. 37.14² =
  38. 38.24² =
  39. 39.13² =
  40. 40.15² =

Answer key

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

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