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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 710 · 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. 1.16² =
  2. 2.24² =
  3. 3.28² =
  4. 4.26² =
  5. 5.19² =
  6. 6.21² =
  7. 7.12² =
  8. 8.11² =
  9. 9.23² =
  10. 10.15² =
  11. 11.14² =
  12. 12.29² =
  13. 13.25² =
  14. 14.18² =
  15. 15.22² =
  16. 16.16² =
  17. 17.13² =
  18. 18.17² =
  19. 19.29² =
  20. 20.27² =
  21. 21.15² =
  22. 22.23² =
  23. 23.24² =
  24. 24.29² =
  25. 25.26² =
  26. 26.15² =
  27. 27.15² =
  28. 28.26² =
  29. 29.22² =
  30. 30.26² =
  31. 31.21² =
  32. 32.14² =
  33. 33.11² =
  34. 34.23² =
  35. 35.25² =
  36. 36.17² =
  37. 37.29² =
  38. 38.16² =
  39. 39.29² =
  40. 40.21² =

Answer key

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

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