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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 299 · 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. 1.18² =
  2. 2.27² =
  3. 3.28² =
  4. 4.23² =
  5. 5.29² =
  6. 6.19² =
  7. 7.21² =
  8. 8.11² =
  9. 9.26² =
  10. 10.25² =
  11. 11.24² =
  12. 12.17² =
  13. 13.12² =
  14. 14.13² =
  15. 15.22² =
  16. 16.24² =
  17. 17.19² =
  18. 18.14² =
  19. 19.16² =
  20. 20.23² =
  21. 21.15² =
  22. 22.28² =
  23. 23.24² =
  24. 24.16² =
  25. 25.12² =
  26. 26.14² =
  27. 27.26² =
  28. 28.16² =
  29. 29.13² =
  30. 30.15² =
  31. 31.16² =
  32. 32.19² =
  33. 33.16² =
  34. 34.23² =
  35. 35.12² =
  36. 36.24² =
  37. 37.23² =
  38. 38.23² =
  39. 39.13² =
  40. 40.23² =

Answer key

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

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