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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 314 · 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. 2.14² =
  3. 3.26² =
  4. 4.17² =
  5. 5.19² =
  6. 6.27² =
  7. 7.29² =
  8. 8.23² =
  9. 9.11² =
  10. 10.16² =
  11. 11.25² =
  12. 12.12² =
  13. 13.15² =
  14. 14.22² =
  15. 15.18² =
  16. 16.13² =
  17. 17.11² =
  18. 18.24² =
  19. 19.12² =
  20. 20.28² =
  21. 21.25² =
  22. 22.15² =
  23. 23.12² =
  24. 24.22² =
  25. 25.28² =
  26. 26.27² =
  27. 27.24² =
  28. 28.24² =
  29. 29.24² =
  30. 30.27² =
  31. 31.23² =
  32. 32.16² =
  33. 33.21² =
  34. 34.19² =
  35. 35.21² =
  36. 36.26² =
  37. 37.14² =
  38. 38.21² =
  39. 39.29² =
  40. 40.22² =

Answer key

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

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