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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 50 · 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. 1.28² =
  2. 2.21² =
  3. 3.13² =
  4. 4.16² =
  5. 5.19² =
  6. 6.24² =
  7. 7.27² =
  8. 8.29² =
  9. 9.18² =
  10. 10.12² =
  11. 11.15² =
  12. 12.11² =
  13. 13.14² =
  14. 14.26² =
  15. 15.23² =
  16. 16.17² =
  17. 17.17² =
  18. 18.11² =
  19. 19.28² =
  20. 20.22² =
  21. 21.15² =
  22. 22.23² =
  23. 23.25² =
  24. 24.27² =
  25. 25.28² =
  26. 26.12² =
  27. 27.27² =
  28. 28.16² =
  29. 29.11² =
  30. 30.21² =
  31. 31.13² =
  32. 32.21² =
  33. 33.29² =
  34. 34.21² =
  35. 35.24² =
  36. 36.26² =
  37. 37.16² =
  38. 38.25² =
  39. 39.16² =
  40. 40.29² =

Answer key

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

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