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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 482 · 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. 1.13² =
  2. 2.16² =
  3. 3.28² =
  4. 4.19² =
  5. 5.24² =
  6. 6.27² =
  7. 7.18² =
  8. 8.12² =
  9. 9.26² =
  10. 10.21² =
  11. 11.29² =
  12. 12.14² =
  13. 13.25² =
  14. 14.15² =
  15. 15.17² =
  16. 16.12² =
  17. 17.11² =
  18. 18.26² =
  19. 19.23² =
  20. 20.16² =
  21. 21.22² =
  22. 22.15² =
  23. 23.18² =
  24. 24.28² =
  25. 25.18² =
  26. 26.14² =
  27. 27.28² =
  28. 28.24² =
  29. 29.21² =
  30. 30.11² =
  31. 31.13² =
  32. 32.23² =
  33. 33.17² =
  34. 34.21² =
  35. 35.15² =
  36. 36.25² =
  37. 37.27² =
  38. 38.19² =
  39. 39.12² =
  40. 40.28² =

Answer key

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

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