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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 586 · 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. 1.21² =
  2. 2.19² =
  3. 3.14² =
  4. 4.13² =
  5. 5.11² =
  6. 6.27² =
  7. 7.26² =
  8. 8.16² =
  9. 9.12² =
  10. 10.24² =
  11. 11.17² =
  12. 12.18² =
  13. 13.29² =
  14. 14.15² =
  15. 15.23² =
  16. 16.22² =
  17. 17.29² =
  18. 18.17² =
  19. 19.25² =
  20. 20.25² =
  21. 21.14² =
  22. 22.26² =
  23. 23.24² =
  24. 24.25² =
  25. 25.15² =
  26. 26.22² =
  27. 27.26² =
  28. 28.28² =
  29. 29.16² =
  30. 30.23² =
  31. 31.29² =
  32. 32.28² =
  33. 33.14² =
  34. 34.18² =
  35. 35.21² =
  36. 36.14² =
  37. 37.12² =
  38. 38.27² =
  39. 39.21² =
  40. 40.26² =

Answer key

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

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