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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 374 · 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. 1.15² =
  2. 2.16² =
  3. 3.11² =
  4. 4.25² =
  5. 5.12² =
  6. 6.28² =
  7. 7.22² =
  8. 8.14² =
  9. 9.13² =
  10. 10.21² =
  11. 11.17² =
  12. 12.29² =
  13. 13.23² =
  14. 14.24² =
  15. 15.27² =
  16. 16.26² =
  17. 17.19² =
  18. 18.29² =
  19. 19.18² =
  20. 20.12² =
  21. 21.24² =
  22. 22.23² =
  23. 23.26² =
  24. 24.18² =
  25. 25.27² =
  26. 26.26² =
  27. 27.19² =
  28. 28.21² =
  29. 29.26² =
  30. 30.14² =
  31. 31.26² =
  32. 32.11² =
  33. 33.19² =
  34. 34.16² =
  35. 35.14² =
  36. 36.29² =
  37. 37.12² =
  38. 38.12² =
  39. 39.26² =
  40. 40.17² =

Answer key

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

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