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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 453 · 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. 1.23² =
  2. 2.13² =
  3. 3.21² =
  4. 4.15² =
  5. 5.14² =
  6. 6.28² =
  7. 7.11² =
  8. 8.27² =
  9. 9.18² =
  10. 10.25² =
  11. 11.19² =
  12. 12.22² =
  13. 13.24² =
  14. 14.26² =
  15. 15.12² =
  16. 16.22² =
  17. 17.16² =
  18. 18.17² =
  19. 19.29² =
  20. 20.15² =
  21. 21.23² =
  22. 22.23² =
  23. 23.28² =
  24. 24.24² =
  25. 25.18² =
  26. 26.15² =
  27. 27.25² =
  28. 28.23² =
  29. 29.18² =
  30. 30.18² =
  31. 31.24² =
  32. 32.15² =
  33. 33.18² =
  34. 34.12² =
  35. 35.21² =
  36. 36.21² =
  37. 37.12² =
  38. 38.19² =
  39. 39.26² =
  40. 40.29² =

Answer key

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

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