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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 748 · 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. 1.19² =
  2. 2.25² =
  3. 3.11² =
  4. 4.22² =
  5. 5.16² =
  6. 6.28² =
  7. 7.13² =
  8. 8.12² =
  9. 9.15² =
  10. 10.26² =
  11. 11.23² =
  12. 12.27² =
  13. 13.21² =
  14. 14.29² =
  15. 15.18² =
  16. 16.24² =
  17. 17.17² =
  18. 18.14² =
  19. 19.27² =
  20. 20.11² =
  21. 21.27² =
  22. 22.29² =
  23. 23.15² =
  24. 24.21² =
  25. 25.25² =
  26. 26.19² =
  27. 27.13² =
  28. 28.12² =
  29. 29.14² =
  30. 30.21² =
  31. 31.17² =
  32. 32.12² =
  33. 33.25² =
  34. 34.11² =
  35. 35.23² =
  36. 36.16² =
  37. 37.26² =
  38. 38.25² =
  39. 39.28² =
  40. 40.21² =

Answer key

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

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