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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 225 · 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. 2.19² =
  3. 3.11² =
  4. 4.24² =
  5. 5.13² =
  6. 6.17² =
  7. 7.21² =
  8. 8.22² =
  9. 9.26² =
  10. 10.12² =
  11. 11.16² =
  12. 12.23² =
  13. 13.28² =
  14. 14.18² =
  15. 15.27² =
  16. 16.16² =
  17. 17.14² =
  18. 18.21² =
  19. 19.26² =
  20. 20.29² =
  21. 21.15² =
  22. 22.18² =
  23. 23.16² =
  24. 24.22² =
  25. 25.12² =
  26. 26.17² =
  27. 27.18² =
  28. 28.26² =
  29. 29.26² =
  30. 30.23² =
  31. 31.11² =
  32. 32.25² =
  33. 33.23² =
  34. 34.24² =
  35. 35.21² =
  36. 36.16² =
  37. 37.14² =
  38. 38.27² =
  39. 39.23² =
  40. 40.12² =

Answer key

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

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