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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 541 · 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. 2.27² =
  3. 3.11² =
  4. 4.25² =
  5. 5.15² =
  6. 6.19² =
  7. 7.17² =
  8. 8.21² =
  9. 9.24² =
  10. 10.28² =
  11. 11.22² =
  12. 12.16² =
  13. 13.12² =
  14. 14.23² =
  15. 15.26² =
  16. 16.18² =
  17. 17.13² =
  18. 18.14² =
  19. 19.15² =
  20. 20.21² =
  21. 21.11² =
  22. 22.13² =
  23. 23.29² =
  24. 24.21² =
  25. 25.18² =
  26. 26.28² =
  27. 27.16² =
  28. 28.27² =
  29. 29.19² =
  30. 30.18² =
  31. 31.17² =
  32. 32.21² =
  33. 33.15² =
  34. 34.21² =
  35. 35.12² =
  36. 36.17² =
  37. 37.12² =
  38. 38.21² =
  39. 39.11² =
  40. 40.19² =

Answer key

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

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