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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 34 · 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. 1.13² =
  2. 2.15² =
  3. 3.28² =
  4. 4.22² =
  5. 5.12² =
  6. 6.18² =
  7. 7.26² =
  8. 8.25² =
  9. 9.27² =
  10. 10.21² =
  11. 11.24² =
  12. 12.16² =
  13. 13.11² =
  14. 14.19² =
  15. 15.12² =
  16. 16.14² =
  17. 17.17² =
  18. 18.19² =
  19. 19.29² =
  20. 20.23² =
  21. 21.12² =
  22. 22.15² =
  23. 23.21² =
  24. 24.22² =
  25. 25.22² =
  26. 26.14² =
  27. 27.13² =
  28. 28.11² =
  29. 29.21² =
  30. 30.21² =
  31. 31.21² =
  32. 32.23² =
  33. 33.21² =
  34. 34.26² =
  35. 35.24² =
  36. 36.14² =
  37. 37.22² =
  38. 38.21² =
  39. 39.18² =
  40. 40.26² =

Answer key

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

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