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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 173 · 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. 1.17² =
  2. 2.15² =
  3. 3.11² =
  4. 4.22² =
  5. 5.14² =
  6. 6.16² =
  7. 7.24² =
  8. 8.21² =
  9. 9.18² =
  10. 10.27² =
  11. 11.12² =
  12. 12.23² =
  13. 13.29² =
  14. 14.13² =
  15. 15.19² =
  16. 16.26² =
  17. 17.25² =
  18. 18.28² =
  19. 19.19² =
  20. 20.26² =
  21. 21.15² =
  22. 22.28² =
  23. 23.21² =
  24. 24.23² =
  25. 25.29² =
  26. 26.15² =
  27. 27.25² =
  28. 28.16² =
  29. 29.29² =
  30. 30.14² =
  31. 31.19² =
  32. 32.15² =
  33. 33.13² =
  34. 34.25² =
  35. 35.24² =
  36. 36.13² =
  37. 37.24² =
  38. 38.12² =
  39. 39.24² =
  40. 40.21² =

Answer key

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

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