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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 690 · 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. 1.25² =
  2. 2.12² =
  3. 3.19² =
  4. 4.23² =
  5. 5.14² =
  6. 6.21² =
  7. 7.27² =
  8. 8.11² =
  9. 9.29² =
  10. 10.24² =
  11. 11.13² =
  12. 12.16² =
  13. 13.26² =
  14. 14.15² =
  15. 15.17² =
  16. 16.25² =
  17. 17.22² =
  18. 18.18² =
  19. 19.19² =
  20. 20.19² =
  21. 21.24² =
  22. 22.28² =
  23. 23.25² =
  24. 24.12² =
  25. 25.17² =
  26. 26.29² =
  27. 27.18² =
  28. 28.29² =
  29. 29.28² =
  30. 30.21² =
  31. 31.19² =
  32. 32.14² =
  33. 33.25² =
  34. 34.15² =
  35. 35.15² =
  36. 36.29² =
  37. 37.19² =
  38. 38.23² =
  39. 39.11² =
  40. 40.22² =

Answer key

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

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