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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 847 · 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. 1.25² =
  2. 2.21² =
  3. 3.18² =
  4. 4.15² =
  5. 5.28² =
  6. 6.26² =
  7. 7.29² =
  8. 8.12² =
  9. 9.16² =
  10. 10.11² =
  11. 11.22² =
  12. 12.14² =
  13. 13.13² =
  14. 14.23² =
  15. 15.17² =
  16. 16.24² =
  17. 17.16² =
  18. 18.19² =
  19. 19.27² =
  20. 20.28² =
  21. 21.21² =
  22. 22.21² =
  23. 23.13² =
  24. 24.29² =
  25. 25.24² =
  26. 26.22² =
  27. 27.21² =
  28. 28.29² =
  29. 29.21² =
  30. 30.12² =
  31. 31.22² =
  32. 32.28² =
  33. 33.14² =
  34. 34.22² =
  35. 35.13² =
  36. 36.15² =
  37. 37.21² =
  38. 38.28² =
  39. 39.14² =
  40. 40.26² =

Answer key

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

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