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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 336 · 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. 2.24² =
  3. 3.16² =
  4. 4.15² =
  5. 5.27² =
  6. 6.11² =
  7. 7.17² =
  8. 8.21² =
  9. 9.18² =
  10. 10.12² =
  11. 11.23² =
  12. 12.13² =
  13. 13.18² =
  14. 14.22² =
  15. 15.14² =
  16. 16.19² =
  17. 17.26² =
  18. 18.29² =
  19. 19.13² =
  20. 20.28² =
  21. 21.18² =
  22. 22.19² =
  23. 23.19² =
  24. 24.21² =
  25. 25.17² =
  26. 26.19² =
  27. 27.12² =
  28. 28.21² =
  29. 29.19² =
  30. 30.21² =
  31. 31.21² =
  32. 32.15² =
  33. 33.11² =
  34. 34.11² =
  35. 35.16² =
  36. 36.14² =
  37. 37.23² =
  38. 38.24² =
  39. 39.29² =
  40. 40.12² =

Answer key

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

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