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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 377 · 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. 1.29² =
  2. 2.12² =
  3. 3.28² =
  4. 4.15² =
  5. 5.13² =
  6. 6.14² =
  7. 7.26² =
  8. 8.21² =
  9. 9.22² =
  10. 10.27² =
  11. 11.25² =
  12. 12.24² =
  13. 13.18² =
  14. 14.17² =
  15. 15.19² =
  16. 16.16² =
  17. 17.18² =
  18. 18.23² =
  19. 19.11² =
  20. 20.19² =
  21. 21.19² =
  22. 22.11² =
  23. 23.12² =
  24. 24.22² =
  25. 25.19² =
  26. 26.15² =
  27. 27.22² =
  28. 28.21² =
  29. 29.26² =
  30. 30.21² =
  31. 31.17² =
  32. 32.15² =
  33. 33.16² =
  34. 34.18² =
  35. 35.28² =
  36. 36.25² =
  37. 37.11² =
  38. 38.23² =
  39. 39.29² =
  40. 40.26² =

Answer key

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

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