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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 572 · 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. 1.24² =
  2. 2.28² =
  3. 3.15² =
  4. 4.17² =
  5. 5.29² =
  6. 6.12² =
  7. 7.22² =
  8. 8.25² =
  9. 9.13² =
  10. 10.11² =
  11. 11.18² =
  12. 12.16² =
  13. 13.19² =
  14. 14.14² =
  15. 15.21² =
  16. 16.26² =
  17. 17.23² =
  18. 18.21² =
  19. 19.27² =
  20. 20.27² =
  21. 21.24² =
  22. 22.24² =
  23. 23.16² =
  24. 24.22² =
  25. 25.12² =
  26. 26.24² =
  27. 27.21² =
  28. 28.17² =
  29. 29.14² =
  30. 30.24² =
  31. 31.29² =
  32. 32.19² =
  33. 33.14² =
  34. 34.21² =
  35. 35.15² =
  36. 36.15² =
  37. 37.12² =
  38. 38.13² =
  39. 39.22² =
  40. 40.28² =

Answer key

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

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