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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 470 · 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. 1.27² =
  2. 2.16² =
  3. 3.12² =
  4. 4.18² =
  5. 5.29² =
  6. 6.15² =
  7. 7.13² =
  8. 8.19² =
  9. 9.11² =
  10. 10.26² =
  11. 11.22² =
  12. 12.25² =
  13. 13.14² =
  14. 14.23² =
  15. 15.21² =
  16. 16.28² =
  17. 17.24² =
  18. 18.28² =
  19. 19.17² =
  20. 20.25² =
  21. 21.25² =
  22. 22.19² =
  23. 23.15² =
  24. 24.23² =
  25. 25.28² =
  26. 26.28² =
  27. 27.22² =
  28. 28.17² =
  29. 29.25² =
  30. 30.18² =
  31. 31.28² =
  32. 32.18² =
  33. 33.11² =
  34. 34.21² =
  35. 35.27² =
  36. 36.11² =
  37. 37.13² =
  38. 38.21² =
  39. 39.28² =
  40. 40.29² =

Answer key

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

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