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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 587 · 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. 1.25² =
  2. 2.13² =
  3. 3.26² =
  4. 4.17² =
  5. 5.18² =
  6. 6.21² =
  7. 7.12² =
  8. 8.29² =
  9. 9.14² =
  10. 10.19² =
  11. 11.28² =
  12. 12.16² =
  13. 13.24² =
  14. 14.11² =
  15. 15.15² =
  16. 16.23² =
  17. 17.27² =
  18. 18.22² =
  19. 19.13² =
  20. 20.17² =
  21. 21.21² =
  22. 22.21² =
  23. 23.17² =
  24. 24.13² =
  25. 25.29² =
  26. 26.23² =
  27. 27.29² =
  28. 28.26² =
  29. 29.18² =
  30. 30.25² =
  31. 31.29² =
  32. 32.27² =
  33. 33.15² =
  34. 34.25² =
  35. 35.18² =
  36. 36.16² =
  37. 37.15² =
  38. 38.28² =
  39. 39.19² =
  40. 40.15² =

Answer key

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

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