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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 317 · 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. 1.16² =
  2. 2.27² =
  3. 3.21² =
  4. 4.19² =
  5. 5.17² =
  6. 6.22² =
  7. 7.28² =
  8. 8.24² =
  9. 9.12² =
  10. 10.18² =
  11. 11.25² =
  12. 12.23² =
  13. 13.13² =
  14. 14.29² =
  15. 15.11² =
  16. 16.14² =
  17. 17.15² =
  18. 18.21² =
  19. 19.26² =
  20. 20.18² =
  21. 21.26² =
  22. 22.21² =
  23. 23.14² =
  24. 24.27² =
  25. 25.28² =
  26. 26.19² =
  27. 27.12² =
  28. 28.25² =
  29. 29.27² =
  30. 30.17² =
  31. 31.19² =
  32. 32.23² =
  33. 33.11² =
  34. 34.29² =
  35. 35.24² =
  36. 36.27² =
  37. 37.19² =
  38. 38.21² =
  39. 39.19² =
  40. 40.21² =

Answer key

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

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