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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 723 · 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. 1.26² =
  2. 2.18² =
  3. 3.12² =
  4. 4.24² =
  5. 5.27² =
  6. 6.17² =
  7. 7.25² =
  8. 8.19² =
  9. 9.13² =
  10. 10.16² =
  11. 11.21² =
  12. 12.22² =
  13. 13.11² =
  14. 14.15² =
  15. 15.29² =
  16. 16.14² =
  17. 17.23² =
  18. 18.21² =
  19. 19.23² =
  20. 20.14² =
  21. 21.27² =
  22. 22.25² =
  23. 23.23² =
  24. 24.28² =
  25. 25.15² =
  26. 26.12² =
  27. 27.27² =
  28. 28.14² =
  29. 29.12² =
  30. 30.13² =
  31. 31.23² =
  32. 32.11² =
  33. 33.29² =
  34. 34.13² =
  35. 35.19² =
  36. 36.24² =
  37. 37.14² =
  38. 38.29² =
  39. 39.11² =
  40. 40.26² =

Answer key

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

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