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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 439 · 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. 2.11² =
  3. 3.22² =
  4. 4.25² =
  5. 5.26² =
  6. 6.13² =
  7. 7.16² =
  8. 8.12² =
  9. 9.27² =
  10. 10.28² =
  11. 11.29² =
  12. 12.19² =
  13. 13.23² =
  14. 14.14² =
  15. 15.18² =
  16. 16.15² =
  17. 17.17² =
  18. 18.28² =
  19. 19.11² =
  20. 20.17² =
  21. 21.27² =
  22. 22.24² =
  23. 23.29² =
  24. 24.15² =
  25. 25.19² =
  26. 26.29² =
  27. 27.25² =
  28. 28.12² =
  29. 29.19² =
  30. 30.29² =
  31. 31.14² =
  32. 32.27² =
  33. 33.28² =
  34. 34.25² =
  35. 35.23² =
  36. 36.22² =
  37. 37.28² =
  38. 38.27² =
  39. 39.22² =
  40. 40.18² =

Answer key

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

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