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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 123 · 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. 2.12² =
  3. 3.29² =
  4. 4.13² =
  5. 5.16² =
  6. 6.17² =
  7. 7.27² =
  8. 8.11² =
  9. 9.24² =
  10. 10.18² =
  11. 11.22² =
  12. 12.28² =
  13. 13.14² =
  14. 14.25² =
  15. 15.19² =
  16. 16.23² =
  17. 17.15² =
  18. 18.26² =
  19. 19.15² =
  20. 20.17² =
  21. 21.19² =
  22. 22.25² =
  23. 23.24² =
  24. 24.26² =
  25. 25.24² =
  26. 26.19² =
  27. 27.13² =
  28. 28.13² =
  29. 29.29² =
  30. 30.22² =
  31. 31.19² =
  32. 32.21² =
  33. 33.25² =
  34. 34.25² =
  35. 35.29² =
  36. 36.18² =
  37. 37.16² =
  38. 38.12² =
  39. 39.12² =
  40. 40.26² =

Answer key

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

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