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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 627 · 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. 1.28² =
  2. 2.15² =
  3. 3.21² =
  4. 4.12² =
  5. 5.22² =
  6. 6.14² =
  7. 7.11² =
  8. 8.24² =
  9. 9.16² =
  10. 10.25² =
  11. 11.27² =
  12. 12.18² =
  13. 13.26² =
  14. 14.13² =
  15. 15.19² =
  16. 16.23² =
  17. 17.29² =
  18. 18.21² =
  19. 19.17² =
  20. 20.14² =
  21. 21.23² =
  22. 22.22² =
  23. 23.12² =
  24. 24.16² =
  25. 25.25² =
  26. 26.19² =
  27. 27.13² =
  28. 28.14² =
  29. 29.22² =
  30. 30.24² =
  31. 31.19² =
  32. 32.18² =
  33. 33.21² =
  34. 34.21² =
  35. 35.13² =
  36. 36.12² =
  37. 37.15² =
  38. 38.21² =
  39. 39.26² =
  40. 40.21² =

Answer key

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

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