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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 376 · 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. 1.15² =
  2. 2.21² =
  3. 3.11² =
  4. 4.13² =
  5. 5.24² =
  6. 6.16² =
  7. 7.17² =
  8. 8.26² =
  9. 9.29² =
  10. 10.12² =
  11. 11.25² =
  12. 12.22² =
  13. 13.19² =
  14. 14.28² =
  15. 15.27² =
  16. 16.14² =
  17. 17.18² =
  18. 18.27² =
  19. 19.23² =
  20. 20.27² =
  21. 21.25² =
  22. 22.21² =
  23. 23.17² =
  24. 24.27² =
  25. 25.23² =
  26. 26.21² =
  27. 27.25² =
  28. 28.24² =
  29. 29.27² =
  30. 30.22² =
  31. 31.27² =
  32. 32.25² =
  33. 33.19² =
  34. 34.18² =
  35. 35.14² =
  36. 36.22² =
  37. 37.23² =
  38. 38.25² =
  39. 39.16² =
  40. 40.21² =

Answer key

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

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