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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 582 · 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. 1.22² =
  2. 2.23² =
  3. 3.11² =
  4. 4.13² =
  5. 5.12² =
  6. 6.26² =
  7. 7.19² =
  8. 8.18² =
  9. 9.15² =
  10. 10.28² =
  11. 11.17² =
  12. 12.16² =
  13. 13.21² =
  14. 14.14² =
  15. 15.25² =
  16. 16.24² =
  17. 17.16² =
  18. 18.13² =
  19. 19.27² =
  20. 20.29² =
  21. 21.25² =
  22. 22.11² =
  23. 23.23² =
  24. 24.13² =
  25. 25.23² =
  26. 26.25² =
  27. 27.25² =
  28. 28.19² =
  29. 29.26² =
  30. 30.15² =
  31. 31.23² =
  32. 32.13² =
  33. 33.12² =
  34. 34.11² =
  35. 35.23² =
  36. 36.17² =
  37. 37.23² =
  38. 38.16² =
  39. 39.27² =
  40. 40.15² =

Answer key

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

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