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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 862 · 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. 1.24² =
  2. 2.18² =
  3. 3.26² =
  4. 4.29² =
  5. 5.12² =
  6. 6.27² =
  7. 7.14² =
  8. 8.23² =
  9. 9.17² =
  10. 10.28² =
  11. 11.11² =
  12. 12.22² =
  13. 13.19² =
  14. 14.15² =
  15. 15.21² =
  16. 16.16² =
  17. 17.27² =
  18. 18.13² =
  19. 19.19² =
  20. 20.25² =
  21. 21.16² =
  22. 22.24² =
  23. 23.19² =
  24. 24.11² =
  25. 25.17² =
  26. 26.28² =
  27. 27.16² =
  28. 28.17² =
  29. 29.15² =
  30. 30.25² =
  31. 31.11² =
  32. 32.19² =
  33. 33.24² =
  34. 34.21² =
  35. 35.25² =
  36. 36.29² =
  37. 37.12² =
  38. 38.16² =
  39. 39.15² =
  40. 40.19² =

Answer key

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

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