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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 799 · 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. 2.22² =
  3. 3.15² =
  4. 4.24² =
  5. 5.21² =
  6. 6.19² =
  7. 7.12² =
  8. 8.29² =
  9. 9.26² =
  10. 10.23² =
  11. 11.27² =
  12. 12.16² =
  13. 13.14² =
  14. 14.13² =
  15. 15.17² =
  16. 16.18² =
  17. 17.12² =
  18. 18.11² =
  19. 19.28² =
  20. 20.15² =
  21. 21.19² =
  22. 22.23² =
  23. 23.15² =
  24. 24.24² =
  25. 25.28² =
  26. 26.12² =
  27. 27.16² =
  28. 28.21² =
  29. 29.14² =
  30. 30.25² =
  31. 31.28² =
  32. 32.14² =
  33. 33.15² =
  34. 34.28² =
  35. 35.27² =
  36. 36.15² =
  37. 37.15² =
  38. 38.27² =
  39. 39.11² =
  40. 40.18² =

Answer key

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

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