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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 405 · 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. 2.14² =
  3. 3.24² =
  4. 4.12² =
  5. 5.29² =
  6. 6.13² =
  7. 7.27² =
  8. 8.15² =
  9. 9.28² =
  10. 10.23² =
  11. 11.11² =
  12. 12.16² =
  13. 13.17² =
  14. 14.26² =
  15. 15.18² =
  16. 16.21² =
  17. 17.19² =
  18. 18.11² =
  19. 19.11² =
  20. 20.14² =
  21. 21.27² =
  22. 22.19² =
  23. 23.22² =
  24. 24.13² =
  25. 25.21² =
  26. 26.14² =
  27. 27.23² =
  28. 28.28² =
  29. 29.16² =
  30. 30.24² =
  31. 31.21² =
  32. 32.17² =
  33. 33.17² =
  34. 34.12² =
  35. 35.19² =
  36. 36.24² =
  37. 37.16² =
  38. 38.23² =
  39. 39.12² =
  40. 40.19² =

Answer key

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

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