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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 133 · 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. 1.19² =
  2. 2.27² =
  3. 3.28² =
  4. 4.15² =
  5. 5.13² =
  6. 6.22² =
  7. 7.29² =
  8. 8.24² =
  9. 9.23² =
  10. 10.11² =
  11. 11.26² =
  12. 12.25² =
  13. 13.12² =
  14. 14.21² =
  15. 15.14² =
  16. 16.18² =
  17. 17.15² =
  18. 18.16² =
  19. 19.17² =
  20. 20.21² =
  21. 21.29² =
  22. 22.12² =
  23. 23.19² =
  24. 24.14² =
  25. 25.21² =
  26. 26.21² =
  27. 27.15² =
  28. 28.21² =
  29. 29.21² =
  30. 30.29² =
  31. 31.24² =
  32. 32.25² =
  33. 33.16² =
  34. 34.26² =
  35. 35.13² =
  36. 36.14² =
  37. 37.28² =
  38. 38.19² =
  39. 39.21² =
  40. 40.21² =

Answer key

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

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