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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 410 · 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. 2.23² =
  3. 3.13² =
  4. 4.17² =
  5. 5.26² =
  6. 6.22² =
  7. 7.19² =
  8. 8.11² =
  9. 9.12² =
  10. 10.18² =
  11. 11.24² =
  12. 12.27² =
  13. 13.14² =
  14. 14.29² =
  15. 15.25² =
  16. 16.21² =
  17. 17.28² =
  18. 18.24² =
  19. 19.13² =
  20. 20.15² =
  21. 21.24² =
  22. 22.11² =
  23. 23.15² =
  24. 24.12² =
  25. 25.23² =
  26. 26.28² =
  27. 27.21² =
  28. 28.16² =
  29. 29.29² =
  30. 30.18² =
  31. 31.17² =
  32. 32.12² =
  33. 33.28² =
  34. 34.18² =
  35. 35.18² =
  36. 36.25² =
  37. 37.15² =
  38. 38.25² =
  39. 39.21² =
  40. 40.23² =

Answer key

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

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