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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 488 · 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. 1.19² =
  2. 2.26² =
  3. 3.24² =
  4. 4.12² =
  5. 5.11² =
  6. 6.23² =
  7. 7.22² =
  8. 8.16² =
  9. 9.17² =
  10. 10.28² =
  11. 11.21² =
  12. 12.15² =
  13. 13.13² =
  14. 14.27² =
  15. 15.14² =
  16. 16.25² =
  17. 17.18² =
  18. 18.28² =
  19. 19.29² =
  20. 20.23² =
  21. 21.11² =
  22. 22.19² =
  23. 23.21² =
  24. 24.19² =
  25. 25.27² =
  26. 26.25² =
  27. 27.12² =
  28. 28.21² =
  29. 29.14² =
  30. 30.29² =
  31. 31.23² =
  32. 32.11² =
  33. 33.19² =
  34. 34.19² =
  35. 35.26² =
  36. 36.14² =
  37. 37.14² =
  38. 38.28² =
  39. 39.29² =
  40. 40.27² =

Answer key

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

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