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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 808 · 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. 2.11² =
  3. 3.18² =
  4. 4.21² =
  5. 5.25² =
  6. 6.24² =
  7. 7.23² =
  8. 8.22² =
  9. 9.12² =
  10. 10.29² =
  11. 11.14² =
  12. 12.19² =
  13. 13.27² =
  14. 14.26² =
  15. 15.17² =
  16. 16.13² =
  17. 17.16² =
  18. 18.15² =
  19. 19.29² =
  20. 20.11² =
  21. 21.17² =
  22. 22.14² =
  23. 23.16² =
  24. 24.12² =
  25. 25.28² =
  26. 26.17² =
  27. 27.21² =
  28. 28.14² =
  29. 29.13² =
  30. 30.29² =
  31. 31.22² =
  32. 32.15² =
  33. 33.27² =
  34. 34.23² =
  35. 35.27² =
  36. 36.26² =
  37. 37.17² =
  38. 38.25² =
  39. 39.16² =
  40. 40.21² =

Answer key

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

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