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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 752 · 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. 2.21² =
  3. 3.23² =
  4. 4.13² =
  5. 5.18² =
  6. 6.17² =
  7. 7.22² =
  8. 8.25² =
  9. 9.12² =
  10. 10.15² =
  11. 11.14² =
  12. 12.11² =
  13. 13.26² =
  14. 14.24² =
  15. 15.29² =
  16. 16.16² =
  17. 17.12² =
  18. 18.28² =
  19. 19.27² =
  20. 20.23² =
  21. 21.27² =
  22. 22.19² =
  23. 23.21² =
  24. 24.25² =
  25. 25.25² =
  26. 26.17² =
  27. 27.24² =
  28. 28.14² =
  29. 29.24² =
  30. 30.14² =
  31. 31.23² =
  32. 32.17² =
  33. 33.21² =
  34. 34.25² =
  35. 35.21² =
  36. 36.16² =
  37. 37.16² =
  38. 38.19² =
  39. 39.19² =
  40. 40.27² =

Answer key

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

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