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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 337 · 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. 1.27² =
  2. 2.18² =
  3. 3.12² =
  4. 4.15² =
  5. 5.24² =
  6. 6.25² =
  7. 7.21² =
  8. 8.16² =
  9. 9.11² =
  10. 10.29² =
  11. 11.22² =
  12. 12.17² =
  13. 13.14² =
  14. 14.28² =
  15. 15.13² =
  16. 16.23² =
  17. 17.26² =
  18. 18.11² =
  19. 19.27² =
  20. 20.18² =
  21. 21.15² =
  22. 22.19² =
  23. 23.16² =
  24. 24.12² =
  25. 25.22² =
  26. 26.24² =
  27. 27.19² =
  28. 28.25² =
  29. 29.13² =
  30. 30.25² =
  31. 31.15² =
  32. 32.25² =
  33. 33.28² =
  34. 34.19² =
  35. 35.28² =
  36. 36.13² =
  37. 37.23² =
  38. 38.14² =
  39. 39.12² =
  40. 40.14² =

Answer key

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

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