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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 791 · 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. 1.26² =
  2. 2.29² =
  3. 3.22² =
  4. 4.18² =
  5. 5.28² =
  6. 6.21² =
  7. 7.12² =
  8. 8.16² =
  9. 9.23² =
  10. 10.27² =
  11. 11.24² =
  12. 12.25² =
  13. 13.11² =
  14. 14.14² =
  15. 15.15² =
  16. 16.15² =
  17. 17.17² =
  18. 18.19² =
  19. 19.24² =
  20. 20.13² =
  21. 21.14² =
  22. 22.27² =
  23. 23.26² =
  24. 24.21² =
  25. 25.27² =
  26. 26.29² =
  27. 27.21² =
  28. 28.21² =
  29. 29.13² =
  30. 30.12² =
  31. 31.16² =
  32. 32.24² =
  33. 33.17² =
  34. 34.26² =
  35. 35.21² =
  36. 36.18² =
  37. 37.15² =
  38. 38.19² =
  39. 39.22² =
  40. 40.14² =

Answer key

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

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