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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 392 · 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. 2.16² =
  3. 3.28² =
  4. 4.12² =
  5. 5.14² =
  6. 6.13² =
  7. 7.18² =
  8. 8.19² =
  9. 9.17² =
  10. 10.21² =
  11. 11.26² =
  12. 12.24² =
  13. 13.15² =
  14. 14.27² =
  15. 15.18² =
  16. 16.23² =
  17. 17.27² =
  18. 18.11² =
  19. 19.25² =
  20. 20.28² =
  21. 21.12² =
  22. 22.17² =
  23. 23.19² =
  24. 24.22² =
  25. 25.14² =
  26. 26.21² =
  27. 27.12² =
  28. 28.19² =
  29. 29.11² =
  30. 30.15² =
  31. 31.21² =
  32. 32.21² =
  33. 33.26² =
  34. 34.27² =
  35. 35.15² =
  36. 36.19² =
  37. 37.12² =
  38. 38.12² =
  39. 39.24² =
  40. 40.19² =

Answer key

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

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