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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 487 · 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. 1.12² =
  2. 2.24² =
  3. 3.17² =
  4. 4.21² =
  5. 5.22² =
  6. 6.16² =
  7. 7.25² =
  8. 8.11² =
  9. 9.13² =
  10. 10.14² =
  11. 11.29² =
  12. 12.15² =
  13. 13.27² =
  14. 14.19² =
  15. 15.23² =
  16. 16.26² =
  17. 17.28² =
  18. 18.23² =
  19. 19.18² =
  20. 20.21² =
  21. 21.14² =
  22. 22.14² =
  23. 23.24² =
  24. 24.29² =
  25. 25.26² =
  26. 26.11² =
  27. 27.15² =
  28. 28.26² =
  29. 29.22² =
  30. 30.29² =
  31. 31.16² =
  32. 32.16² =
  33. 33.21² =
  34. 34.18² =
  35. 35.27² =
  36. 36.25² =
  37. 37.17² =
  38. 38.27² =
  39. 39.14² =
  40. 40.14² =

Answer key

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

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