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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 781 · 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. 3.28² =
  4. 4.29² =
  5. 5.21² =
  6. 6.23² =
  7. 7.16² =
  8. 8.22² =
  9. 9.19² =
  10. 10.14² =
  11. 11.12² =
  12. 12.27² =
  13. 13.24² =
  14. 14.26² =
  15. 15.17² =
  16. 16.25² =
  17. 17.13² =
  18. 18.23² =
  19. 19.11² =
  20. 20.17² =
  21. 21.27² =
  22. 22.13² =
  23. 23.26² =
  24. 24.13² =
  25. 25.16² =
  26. 26.23² =
  27. 27.15² =
  28. 28.12² =
  29. 29.23² =
  30. 30.16² =
  31. 31.12² =
  32. 32.25² =
  33. 33.15² =
  34. 34.28² =
  35. 35.29² =
  36. 36.11² =
  37. 37.28² =
  38. 38.15² =
  39. 39.17² =
  40. 40.19² =

Answer key

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

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