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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 696 · 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. 1.13² =
  2. 2.21² =
  3. 3.17² =
  4. 4.23² =
  5. 5.25² =
  6. 6.16² =
  7. 7.29² =
  8. 8.14² =
  9. 9.11² =
  10. 10.28² =
  11. 11.18² =
  12. 12.27² =
  13. 13.12² =
  14. 14.24² =
  15. 15.15² =
  16. 16.26² =
  17. 17.22² =
  18. 18.19² =
  19. 19.24² =
  20. 20.15² =
  21. 21.27² =
  22. 22.11² =
  23. 23.26² =
  24. 24.25² =
  25. 25.29² =
  26. 26.21² =
  27. 27.27² =
  28. 28.25² =
  29. 29.14² =
  30. 30.25² =
  31. 31.28² =
  32. 32.26² =
  33. 33.15² =
  34. 34.25² =
  35. 35.18² =
  36. 36.15² =
  37. 37.25² =
  38. 38.13² =
  39. 39.16² =
  40. 40.16² =

Answer key

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

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