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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 698 · 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. 1.27² =
  2. 2.21² =
  3. 3.14² =
  4. 4.23² =
  5. 5.15² =
  6. 6.17² =
  7. 7.19² =
  8. 8.26² =
  9. 9.12² =
  10. 10.11² =
  11. 11.18² =
  12. 12.13² =
  13. 13.24² =
  14. 14.29² =
  15. 15.25² =
  16. 16.22² =
  17. 17.16² =
  18. 18.28² =
  19. 19.24² =
  20. 20.17² =
  21. 21.21² =
  22. 22.29² =
  23. 23.15² =
  24. 24.14² =
  25. 25.15² =
  26. 26.11² =
  27. 27.19² =
  28. 28.22² =
  29. 29.23² =
  30. 30.25² =
  31. 31.16² =
  32. 32.21² =
  33. 33.16² =
  34. 34.19² =
  35. 35.21² =
  36. 36.13² =
  37. 37.25² =
  38. 38.14² =
  39. 39.21² =
  40. 40.25² =

Answer key

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

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