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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 271 · 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. 2.29² =
  3. 3.18² =
  4. 4.25² =
  5. 5.15² =
  6. 6.12² =
  7. 7.26² =
  8. 8.11² =
  9. 9.17² =
  10. 10.22² =
  11. 11.23² =
  12. 12.14² =
  13. 13.13² =
  14. 14.28² =
  15. 15.19² =
  16. 16.27² =
  17. 17.19² =
  18. 18.24² =
  19. 19.16² =
  20. 20.21² =
  21. 21.25² =
  22. 22.14² =
  23. 23.22² =
  24. 24.17² =
  25. 25.24² =
  26. 26.12² =
  27. 27.29² =
  28. 28.12² =
  29. 29.19² =
  30. 30.25² =
  31. 31.29² =
  32. 32.12² =
  33. 33.24² =
  34. 34.16² =
  35. 35.24² =
  36. 36.14² =
  37. 37.15² =
  38. 38.29² =
  39. 39.23² =
  40. 40.24² =

Answer key

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

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