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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 122 · 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. 1.23² =
  2. 2.14² =
  3. 3.28² =
  4. 4.15² =
  5. 5.17² =
  6. 6.26² =
  7. 7.18² =
  8. 8.13² =
  9. 9.19² =
  10. 10.21² =
  11. 11.29² =
  12. 12.25² =
  13. 13.12² =
  14. 14.27² =
  15. 15.24² =
  16. 16.16² =
  17. 17.12² =
  18. 18.12² =
  19. 19.12² =
  20. 20.22² =
  21. 21.16² =
  22. 22.23² =
  23. 23.17² =
  24. 24.11² =
  25. 25.27² =
  26. 26.21² =
  27. 27.26² =
  28. 28.23² =
  29. 29.21² =
  30. 30.19² =
  31. 31.13² =
  32. 32.29² =
  33. 33.16² =
  34. 34.22² =
  35. 35.25² =
  36. 36.19² =
  37. 37.17² =
  38. 38.25² =
  39. 39.21² =
  40. 40.24² =

Answer key

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

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