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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 594 · 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. 2.23² =
  3. 3.17² =
  4. 4.15² =
  5. 5.26² =
  6. 6.14² =
  7. 7.16² =
  8. 8.19² =
  9. 9.18² =
  10. 10.24² =
  11. 11.27² =
  12. 12.11² =
  13. 13.13² =
  14. 14.25² =
  15. 15.28² =
  16. 16.12² =
  17. 17.22² =
  18. 18.14² =
  19. 19.29² =
  20. 20.18² =
  21. 21.27² =
  22. 22.25² =
  23. 23.21² =
  24. 24.12² =
  25. 25.18² =
  26. 26.18² =
  27. 27.23² =
  28. 28.13² =
  29. 29.16² =
  30. 30.13² =
  31. 31.23² =
  32. 32.12² =
  33. 33.22² =
  34. 34.13² =
  35. 35.14² =
  36. 36.25² =
  37. 37.11² =
  38. 38.26² =
  39. 39.14² =
  40. 40.13² =

Answer key

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

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