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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 4 · 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. 1.25² =
  2. 2.24² =
  3. 3.12² =
  4. 4.21² =
  5. 5.17² =
  6. 6.29² =
  7. 7.19² =
  8. 8.13² =
  9. 9.15² =
  10. 10.16² =
  11. 11.26² =
  12. 12.14² =
  13. 13.17² =
  14. 14.11² =
  15. 15.27² =
  16. 16.22² =
  17. 17.25² =
  18. 18.18² =
  19. 19.11² =
  20. 20.23² =
  21. 21.28² =
  22. 22.16² =
  23. 23.15² =
  24. 24.14² =
  25. 25.17² =
  26. 26.27² =
  27. 27.24² =
  28. 28.28² =
  29. 29.28² =
  30. 30.18² =
  31. 31.14² =
  32. 32.23² =
  33. 33.11² =
  34. 34.25² =
  35. 35.18² =
  36. 36.12² =
  37. 37.21² =
  38. 38.19² =
  39. 39.21² =
  40. 40.27² =

Answer key

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

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