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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 6 · 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. 1.25² =
  2. 2.12² =
  3. 3.13² =
  4. 4.19² =
  5. 5.18² =
  6. 6.17² =
  7. 7.26² =
  8. 8.21² =
  9. 9.14² =
  10. 10.22² =
  11. 11.27² =
  12. 12.15² =
  13. 13.24² =
  14. 14.28² =
  15. 15.16² =
  16. 16.29² =
  17. 17.11² =
  18. 18.29² =
  19. 19.27² =
  20. 20.22² =
  21. 21.23² =
  22. 22.26² =
  23. 23.17² =
  24. 24.22² =
  25. 25.26² =
  26. 26.25² =
  27. 27.12² =
  28. 28.15² =
  29. 29.13² =
  30. 30.15² =
  31. 31.26² =
  32. 32.12² =
  33. 33.21² =
  34. 34.17² =
  35. 35.27² =
  36. 36.12² =
  37. 37.27² =
  38. 38.12² =
  39. 39.28² =
  40. 40.19² =

Answer key

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

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