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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 544 · 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. 2.17² =
  3. 3.18² =
  4. 4.21² =
  5. 5.11² =
  6. 6.28² =
  7. 7.13² =
  8. 8.22² =
  9. 9.25² =
  10. 10.24² =
  11. 11.16² =
  12. 12.27² =
  13. 13.29² =
  14. 14.23² =
  15. 15.14² =
  16. 16.19² =
  17. 17.12² =
  18. 18.13² =
  19. 19.11² =
  20. 20.15² =
  21. 21.12² =
  22. 22.19² =
  23. 23.23² =
  24. 24.11² =
  25. 25.16² =
  26. 26.26² =
  27. 27.13² =
  28. 28.12² =
  29. 29.13² =
  30. 30.13² =
  31. 31.23² =
  32. 32.23² =
  33. 33.26² =
  34. 34.22² =
  35. 35.15² =
  36. 36.16² =
  37. 37.26² =
  38. 38.29² =
  39. 39.13² =
  40. 40.21² =

Answer key

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

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