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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 329 · 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. 1.27² =
  2. 2.11² =
  3. 3.21² =
  4. 4.29² =
  5. 5.26² =
  6. 6.14² =
  7. 7.12² =
  8. 8.15² =
  9. 9.13² =
  10. 10.16² =
  11. 11.25² =
  12. 12.17² =
  13. 13.23² =
  14. 14.24² =
  15. 15.28² =
  16. 16.19² =
  17. 17.18² =
  18. 18.22² =
  19. 19.23² =
  20. 20.17² =
  21. 21.21² =
  22. 22.11² =
  23. 23.28² =
  24. 24.25² =
  25. 25.13² =
  26. 26.21² =
  27. 27.18² =
  28. 28.27² =
  29. 29.12² =
  30. 30.21² =
  31. 31.15² =
  32. 32.25² =
  33. 33.24² =
  34. 34.11² =
  35. 35.12² =
  36. 36.13² =
  37. 37.29² =
  38. 38.15² =
  39. 39.23² =
  40. 40.21² =

Answer key

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

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