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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 519 · 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. 1.13² =
  2. 2.25² =
  3. 3.22² =
  4. 4.18² =
  5. 5.26² =
  6. 6.21² =
  7. 7.16² =
  8. 8.23² =
  9. 9.28² =
  10. 10.11² =
  11. 11.27² =
  12. 12.17² =
  13. 13.14² =
  14. 14.12² =
  15. 15.14² =
  16. 16.19² =
  17. 17.15² =
  18. 18.25² =
  19. 19.29² =
  20. 20.23² =
  21. 21.16² =
  22. 22.26² =
  23. 23.23² =
  24. 24.21² =
  25. 25.17² =
  26. 26.15² =
  27. 27.23² =
  28. 28.19² =
  29. 29.24² =
  30. 30.22² =
  31. 31.14² =
  32. 32.14² =
  33. 33.14² =
  34. 34.11² =
  35. 35.29² =
  36. 36.11² =
  37. 37.14² =
  38. 38.29² =
  39. 39.17² =
  40. 40.28² =

Answer key

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

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