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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 514 · 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. 1.11² =
  2. 2.22² =
  3. 3.28² =
  4. 4.15² =
  5. 5.13² =
  6. 6.21² =
  7. 7.12² =
  8. 8.17² =
  9. 9.27² =
  10. 10.29² =
  11. 11.24² =
  12. 12.23² =
  13. 13.25² =
  14. 14.16² =
  15. 15.19² =
  16. 16.26² =
  17. 17.14² =
  18. 18.16² =
  19. 19.24² =
  20. 20.13² =
  21. 21.15² =
  22. 22.11² =
  23. 23.18² =
  24. 24.11² =
  25. 25.14² =
  26. 26.12² =
  27. 27.26² =
  28. 28.16² =
  29. 29.13² =
  30. 30.22² =
  31. 31.12² =
  32. 32.17² =
  33. 33.21² =
  34. 34.27² =
  35. 35.26² =
  36. 36.17² =
  37. 37.12² =
  38. 38.26² =
  39. 39.25² =
  40. 40.14² =

Answer key

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

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