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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 385 · 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. 2.22² =
  3. 3.27² =
  4. 4.26² =
  5. 5.14² =
  6. 6.15² =
  7. 7.23² =
  8. 8.13² =
  9. 9.12² =
  10. 10.19² =
  11. 11.24² =
  12. 12.16² =
  13. 13.17² =
  14. 14.21² =
  15. 15.11² =
  16. 16.25² =
  17. 17.18² =
  18. 18.15² =
  19. 19.25² =
  20. 20.15² =
  21. 21.29² =
  22. 22.21² =
  23. 23.17² =
  24. 24.28² =
  25. 25.17² =
  26. 26.24² =
  27. 27.29² =
  28. 28.16² =
  29. 29.19² =
  30. 30.16² =
  31. 31.21² =
  32. 32.15² =
  33. 33.16² =
  34. 34.28² =
  35. 35.19² =
  36. 36.21² =
  37. 37.15² =
  38. 38.11² =
  39. 39.12² =
  40. 40.23² =

Answer key

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

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