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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 593 · 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. 2.15² =
  3. 3.28² =
  4. 4.23² =
  5. 5.18² =
  6. 6.12² =
  7. 7.29² =
  8. 8.14² =
  9. 9.27² =
  10. 10.26² =
  11. 11.25² =
  12. 12.22² =
  13. 13.11² =
  14. 14.16² =
  15. 15.13² =
  16. 16.17² =
  17. 17.21² =
  18. 18.25² =
  19. 19.24² =
  20. 20.18² =
  21. 21.15² =
  22. 22.29² =
  23. 23.28² =
  24. 24.22² =
  25. 25.27² =
  26. 26.13² =
  27. 27.29² =
  28. 28.16² =
  29. 29.27² =
  30. 30.21² =
  31. 31.29² =
  32. 32.28² =
  33. 33.22² =
  34. 34.25² =
  35. 35.28² =
  36. 36.16² =
  37. 37.28² =
  38. 38.16² =
  39. 39.23² =
  40. 40.25² =

Answer key

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

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