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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 182 · 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. 2.18² =
  3. 3.25² =
  4. 4.26² =
  5. 5.21² =
  6. 6.19² =
  7. 7.27² =
  8. 8.11² =
  9. 9.14² =
  10. 10.16² =
  11. 11.12² =
  12. 12.23² =
  13. 13.13² =
  14. 14.29² =
  15. 15.28² =
  16. 16.17² =
  17. 17.22² =
  18. 18.24² =
  19. 19.18² =
  20. 20.27² =
  21. 21.29² =
  22. 22.12² =
  23. 23.21² =
  24. 24.12² =
  25. 25.22² =
  26. 26.25² =
  27. 27.19² =
  28. 28.29² =
  29. 29.15² =
  30. 30.22² =
  31. 31.27² =
  32. 32.11² =
  33. 33.14² =
  34. 34.27² =
  35. 35.25² =
  36. 36.21² =
  37. 37.26² =
  38. 38.29² =
  39. 39.19² =
  40. 40.29² =

Answer key

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

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