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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 576 · 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. 2.14² =
  3. 3.23² =
  4. 4.22² =
  5. 5.16² =
  6. 6.24² =
  7. 7.12² =
  8. 8.27² =
  9. 9.11² =
  10. 10.13² =
  11. 11.21² =
  12. 12.28² =
  13. 13.26² =
  14. 14.17² =
  15. 15.18² =
  16. 16.25² =
  17. 17.19² =
  18. 18.18² =
  19. 19.15² =
  20. 20.29² =
  21. 21.25² =
  22. 22.15² =
  23. 23.27² =
  24. 24.17² =
  25. 25.12² =
  26. 26.19² =
  27. 27.14² =
  28. 28.15² =
  29. 29.16² =
  30. 30.18² =
  31. 31.21² =
  32. 32.26² =
  33. 33.11² =
  34. 34.12² =
  35. 35.16² =
  36. 36.24² =
  37. 37.25² =
  38. 38.26² =
  39. 39.17² =
  40. 40.24² =

Answer key

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

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