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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 206 · 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. 1.15² =
  2. 2.27² =
  3. 3.29² =
  4. 4.14² =
  5. 5.13² =
  6. 6.11² =
  7. 7.16² =
  8. 8.19² =
  9. 9.12² =
  10. 10.21² =
  11. 11.23² =
  12. 12.17² =
  13. 13.26² =
  14. 14.28² =
  15. 15.24² =
  16. 16.25² =
  17. 17.22² =
  18. 18.11² =
  19. 19.17² =
  20. 20.26² =
  21. 21.13² =
  22. 22.25² =
  23. 23.14² =
  24. 24.14² =
  25. 25.13² =
  26. 26.18² =
  27. 27.15² =
  28. 28.21² =
  29. 29.23² =
  30. 30.14² =
  31. 31.28² =
  32. 32.24² =
  33. 33.21² =
  34. 34.11² =
  35. 35.12² =
  36. 36.11² =
  37. 37.11² =
  38. 38.22² =
  39. 39.19² =
  40. 40.21² =

Answer key

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

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