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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 356 · 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. 1.14² =
  2. 2.18² =
  3. 3.28² =
  4. 4.11² =
  5. 5.26² =
  6. 6.21² =
  7. 7.19² =
  8. 8.16² =
  9. 9.13² =
  10. 10.15² =
  11. 11.25² =
  12. 12.29² =
  13. 13.17² =
  14. 14.12² =
  15. 15.22² =
  16. 16.23² =
  17. 17.23² =
  18. 18.22² =
  19. 19.27² =
  20. 20.21² =
  21. 21.12² =
  22. 22.24² =
  23. 23.23² =
  24. 24.11² =
  25. 25.14² =
  26. 26.13² =
  27. 27.21² =
  28. 28.22² =
  29. 29.14² =
  30. 30.21² =
  31. 31.19² =
  32. 32.23² =
  33. 33.24² =
  34. 34.15² =
  35. 35.13² =
  36. 36.24² =
  37. 37.21² =
  38. 38.17² =
  39. 39.15² =
  40. 40.22² =

Answer key

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

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