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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 460 · 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. 1.21² =
  2. 2.17² =
  3. 3.28² =
  4. 4.26² =
  5. 5.14² =
  6. 6.15² =
  7. 7.18² =
  8. 8.23² =
  9. 9.27² =
  10. 10.19² =
  11. 11.24² =
  12. 12.11² =
  13. 13.29² =
  14. 14.13² =
  15. 15.25² =
  16. 16.28² =
  17. 17.22² =
  18. 18.12² =
  19. 19.22² =
  20. 20.21² =
  21. 21.16² =
  22. 22.14² =
  23. 23.15² =
  24. 24.12² =
  25. 25.26² =
  26. 26.17² =
  27. 27.17² =
  28. 28.25² =
  29. 29.28² =
  30. 30.25² =
  31. 31.26² =
  32. 32.23² =
  33. 33.11² =
  34. 34.25² =
  35. 35.16² =
  36. 36.13² =
  37. 37.17² =
  38. 38.19² =
  39. 39.25² =
  40. 40.27² =

Answer key

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

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