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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 664 · 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. 2.26² =
  3. 3.21² =
  4. 4.23² =
  5. 5.22² =
  6. 6.13² =
  7. 7.24² =
  8. 8.16² =
  9. 9.15² =
  10. 10.11² =
  11. 11.17² =
  12. 12.19² =
  13. 13.18² =
  14. 14.25² =
  15. 15.28² =
  16. 16.29² =
  17. 17.14² =
  18. 18.27² =
  19. 19.11² =
  20. 20.27² =
  21. 21.11² =
  22. 22.23² =
  23. 23.29² =
  24. 24.12² =
  25. 25.21² =
  26. 26.15² =
  27. 27.17² =
  28. 28.14² =
  29. 29.17² =
  30. 30.17² =
  31. 31.12² =
  32. 32.28² =
  33. 33.17² =
  34. 34.22² =
  35. 35.21² =
  36. 36.13² =
  37. 37.28² =
  38. 38.28² =
  39. 39.25² =
  40. 40.14² =

Answer key

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

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