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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 413 · 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. 1.26² =
  2. 2.25² =
  3. 3.19² =
  4. 4.16² =
  5. 5.13² =
  6. 6.28² =
  7. 7.29² =
  8. 8.15² =
  9. 9.17² =
  10. 10.21² =
  11. 11.11² =
  12. 12.23² =
  13. 13.14² =
  14. 14.27² =
  15. 15.24² =
  16. 16.18² =
  17. 17.22² =
  18. 18.12² =
  19. 19.14² =
  20. 20.25² =
  21. 21.14² =
  22. 22.12² =
  23. 23.29² =
  24. 24.15² =
  25. 25.15² =
  26. 26.11² =
  27. 27.21² =
  28. 28.11² =
  29. 29.15² =
  30. 30.12² =
  31. 31.21² =
  32. 32.28² =
  33. 33.18² =
  34. 34.24² =
  35. 35.15² =
  36. 36.13² =
  37. 37.27² =
  38. 38.12² =
  39. 39.19² =
  40. 40.21² =

Answer key

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

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