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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 352 · 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. 1.15² =
  2. 2.19² =
  3. 3.29² =
  4. 4.13² =
  5. 5.22² =
  6. 6.18² =
  7. 7.21² =
  8. 8.11² =
  9. 9.17² =
  10. 10.23² =
  11. 11.16² =
  12. 12.25² =
  13. 13.28² =
  14. 14.14² =
  15. 15.26² =
  16. 16.27² =
  17. 17.24² =
  18. 18.12² =
  19. 19.11² =
  20. 20.24² =
  21. 21.12² =
  22. 22.24² =
  23. 23.17² =
  24. 24.27² =
  25. 25.21² =
  26. 26.12² =
  27. 27.21² =
  28. 28.18² =
  29. 29.12² =
  30. 30.12² =
  31. 31.12² =
  32. 32.13² =
  33. 33.14² =
  34. 34.15² =
  35. 35.21² =
  36. 36.21² =
  37. 37.18² =
  38. 38.24² =
  39. 39.29² =
  40. 40.13² =

Answer key

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

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