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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 509 · 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. 1.25² =
  2. 2.23² =
  3. 3.22² =
  4. 4.11² =
  5. 5.21² =
  6. 6.19² =
  7. 7.14² =
  8. 8.12² =
  9. 9.26² =
  10. 10.15² =
  11. 11.28² =
  12. 12.29² =
  13. 13.27² =
  14. 14.24² =
  15. 15.13² =
  16. 16.16² =
  17. 17.16² =
  18. 18.18² =
  19. 19.22² =
  20. 20.17² =
  21. 21.22² =
  22. 22.15² =
  23. 23.24² =
  24. 24.22² =
  25. 25.16² =
  26. 26.26² =
  27. 27.13² =
  28. 28.15² =
  29. 29.23² =
  30. 30.21² =
  31. 31.11² =
  32. 32.16² =
  33. 33.18² =
  34. 34.11² =
  35. 35.16² =
  36. 36.24² =
  37. 37.12² =
  38. 38.12² =
  39. 39.21² =
  40. 40.23² =

Answer key

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

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