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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 513 · 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. 1.15² =
  2. 2.18² =
  3. 3.23² =
  4. 4.13² =
  5. 5.11² =
  6. 6.19² =
  7. 7.17² =
  8. 8.27² =
  9. 9.24² =
  10. 10.21² =
  11. 11.14² =
  12. 12.29² =
  13. 13.28² =
  14. 14.26² =
  15. 15.25² =
  16. 16.12² =
  17. 17.22² =
  18. 18.21² =
  19. 19.16² =
  20. 20.29² =
  21. 21.18² =
  22. 22.22² =
  23. 23.21² =
  24. 24.22² =
  25. 25.27² =
  26. 26.29² =
  27. 27.21² =
  28. 28.17² =
  29. 29.16² =
  30. 30.13² =
  31. 31.23² =
  32. 32.25² =
  33. 33.17² =
  34. 34.18² =
  35. 35.19² =
  36. 36.14² =
  37. 37.15² =
  38. 38.13² =
  39. 39.23² =
  40. 40.29² =

Answer key

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

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