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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 201 · 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. 2.15² =
  3. 3.23² =
  4. 4.29² =
  5. 5.27² =
  6. 6.26² =
  7. 7.28² =
  8. 8.12² =
  9. 9.11² =
  10. 10.13² =
  11. 11.24² =
  12. 12.18² =
  13. 13.17² =
  14. 14.21² =
  15. 15.22² =
  16. 16.25² =
  17. 17.16² =
  18. 18.24² =
  19. 19.19² =
  20. 20.13² =
  21. 21.11² =
  22. 22.24² =
  23. 23.28² =
  24. 24.29² =
  25. 25.15² =
  26. 26.21² =
  27. 27.27² =
  28. 28.21² =
  29. 29.22² =
  30. 30.27² =
  31. 31.23² =
  32. 32.14² =
  33. 33.25² =
  34. 34.16² =
  35. 35.21² =
  36. 36.23² =
  37. 37.12² =
  38. 38.22² =
  39. 39.15² =
  40. 40.25² =

Answer key

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

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