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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 596 · 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. 2.21² =
  3. 3.24² =
  4. 4.23² =
  5. 5.27² =
  6. 6.14² =
  7. 7.15² =
  8. 8.13² =
  9. 9.25² =
  10. 10.12² =
  11. 11.17² =
  12. 12.22² =
  13. 13.28² =
  14. 14.18² =
  15. 15.29² =
  16. 16.26² =
  17. 17.11² =
  18. 18.16² =
  19. 19.22² =
  20. 20.28² =
  21. 21.16² =
  22. 22.23² =
  23. 23.11² =
  24. 24.16² =
  25. 25.27² =
  26. 26.12² =
  27. 27.16² =
  28. 28.21² =
  29. 29.26² =
  30. 30.12² =
  31. 31.12² =
  32. 32.16² =
  33. 33.11² =
  34. 34.13² =
  35. 35.16² =
  36. 36.15² =
  37. 37.27² =
  38. 38.23² =
  39. 39.18² =
  40. 40.19² =

Answer key

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

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