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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 747 · 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. 2.18² =
  3. 3.29² =
  4. 4.21² =
  5. 5.25² =
  6. 6.14² =
  7. 7.12² =
  8. 8.28² =
  9. 9.17² =
  10. 10.26² =
  11. 11.24² =
  12. 12.15² =
  13. 13.16² =
  14. 14.13² =
  15. 15.29² =
  16. 16.27² =
  17. 17.11² =
  18. 18.22² =
  19. 19.17² =
  20. 20.23² =
  21. 21.27² =
  22. 22.17² =
  23. 23.27² =
  24. 24.29² =
  25. 25.21² =
  26. 26.11² =
  27. 27.12² =
  28. 28.29² =
  29. 29.13² =
  30. 30.28² =
  31. 31.21² =
  32. 32.12² =
  33. 33.27² =
  34. 34.15² =
  35. 35.26² =
  36. 36.29² =
  37. 37.16² =
  38. 38.18² =
  39. 39.24² =
  40. 40.13² =

Answer key

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

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