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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 302 · 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. 1.21² =
  2. 2.24² =
  3. 3.26² =
  4. 4.23² =
  5. 5.16² =
  6. 6.22² =
  7. 7.18² =
  8. 8.27² =
  9. 9.11² =
  10. 10.14² =
  11. 11.12² =
  12. 12.29² =
  13. 13.13² =
  14. 14.24² =
  15. 15.15² =
  16. 16.28² =
  17. 17.28² =
  18. 18.17² =
  19. 19.28² =
  20. 20.19² =
  21. 21.25² =
  22. 22.12² =
  23. 23.15² =
  24. 24.19² =
  25. 25.17² =
  26. 26.25² =
  27. 27.11² =
  28. 28.21² =
  29. 29.14² =
  30. 30.13² =
  31. 31.24² =
  32. 32.28² =
  33. 33.21² =
  34. 34.21² =
  35. 35.27² =
  36. 36.14² =
  37. 37.12² =
  38. 38.17² =
  39. 39.18² =
  40. 40.27² =

Answer key

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

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