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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 235 · 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. 1.29² =
  2. 2.12² =
  3. 3.19² =
  4. 4.16² =
  5. 5.17² =
  6. 6.25² =
  7. 7.21² =
  8. 8.14² =
  9. 9.18² =
  10. 10.22² =
  11. 11.23² =
  12. 12.15² =
  13. 13.28² =
  14. 14.11² =
  15. 15.15² =
  16. 16.24² =
  17. 17.27² =
  18. 18.26² =
  19. 19.13² =
  20. 20.25² =
  21. 21.27² =
  22. 22.18² =
  23. 23.15² =
  24. 24.12² =
  25. 25.12² =
  26. 26.18² =
  27. 27.23² =
  28. 28.27² =
  29. 29.11² =
  30. 30.26² =
  31. 31.27² =
  32. 32.18² =
  33. 33.29² =
  34. 34.21² =
  35. 35.22² =
  36. 36.18² =
  37. 37.12² =
  38. 38.24² =
  39. 39.22² =
  40. 40.15² =

Answer key

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

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