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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 522 · 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. 1.12² =
  2. 2.22² =
  3. 3.21² =
  4. 4.18² =
  5. 5.17² =
  6. 6.28² =
  7. 7.24² =
  8. 8.19² =
  9. 9.16² =
  10. 10.29² =
  11. 11.15² =
  12. 12.27² =
  13. 13.14² =
  14. 14.26² =
  15. 15.11² =
  16. 16.11² =
  17. 17.13² =
  18. 18.25² =
  19. 19.21² =
  20. 20.26² =
  21. 21.16² =
  22. 22.17² =
  23. 23.12² =
  24. 24.23² =
  25. 25.28² =
  26. 26.25² =
  27. 27.24² =
  28. 28.17² =
  29. 29.16² =
  30. 30.21² =
  31. 31.14² =
  32. 32.25² =
  33. 33.18² =
  34. 34.19² =
  35. 35.19² =
  36. 36.26² =
  37. 37.22² =
  38. 38.16² =
  39. 39.23² =
  40. 40.25² =

Answer key

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

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