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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 358 · 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. 3.27² =
  4. 4.14² =
  5. 5.26² =
  6. 6.13² =
  7. 7.22² =
  8. 8.12² =
  9. 9.21² =
  10. 10.29² =
  11. 11.17² =
  12. 12.18² =
  13. 13.11² =
  14. 14.25² =
  15. 15.24² =
  16. 16.28² =
  17. 17.16² =
  18. 18.21² =
  19. 19.25² =
  20. 20.28² =
  21. 21.23² =
  22. 22.21² =
  23. 23.21² =
  24. 24.13² =
  25. 25.23² =
  26. 26.25² =
  27. 27.17² =
  28. 28.13² =
  29. 29.12² =
  30. 30.25² =
  31. 31.12² =
  32. 32.11² =
  33. 33.24² =
  34. 34.25² =
  35. 35.18² =
  36. 36.14² =
  37. 37.26² =
  38. 38.27² =
  39. 39.29² =
  40. 40.23² =

Answer key

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

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