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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 583 · 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. 1.19² =
  2. 2.13² =
  3. 3.11² =
  4. 4.17² =
  5. 5.28² =
  6. 6.27² =
  7. 7.14² =
  8. 8.26² =
  9. 9.24² =
  10. 10.16² =
  11. 11.21² =
  12. 12.29² =
  13. 13.25² =
  14. 14.23² =
  15. 15.12² =
  16. 16.15² =
  17. 17.28² =
  18. 18.18² =
  19. 19.24² =
  20. 20.18² =
  21. 21.21² =
  22. 22.22² =
  23. 23.25² =
  24. 24.23² =
  25. 25.29² =
  26. 26.21² =
  27. 27.12² =
  28. 28.14² =
  29. 29.15² =
  30. 30.26² =
  31. 31.12² =
  32. 32.13² =
  33. 33.25² =
  34. 34.21² =
  35. 35.15² =
  36. 36.21² =
  37. 37.19² =
  38. 38.29² =
  39. 39.21² =
  40. 40.25² =

Answer key

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

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