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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 39 · 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. 1.15² =
  2. 2.17² =
  3. 3.18² =
  4. 4.14² =
  5. 5.16² =
  6. 6.12² =
  7. 7.24² =
  8. 8.22² =
  9. 9.27² =
  10. 10.13² =
  11. 11.19² =
  12. 12.21² =
  13. 13.28² =
  14. 14.29² =
  15. 15.11² =
  16. 16.25² =
  17. 17.23² =
  18. 18.15² =
  19. 19.21² =
  20. 20.26² =
  21. 21.25² =
  22. 22.16² =
  23. 23.18² =
  24. 24.22² =
  25. 25.15² =
  26. 26.24² =
  27. 27.19² =
  28. 28.16² =
  29. 29.19² =
  30. 30.16² =
  31. 31.11² =
  32. 32.17² =
  33. 33.27² =
  34. 34.22² =
  35. 35.12² =
  36. 36.13² =
  37. 37.11² =
  38. 38.19² =
  39. 39.25² =
  40. 40.18² =

Answer key

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

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