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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 167 · 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. 1.18² =
  2. 2.13² =
  3. 3.29² =
  4. 4.26² =
  5. 5.14² =
  6. 6.22² =
  7. 7.19² =
  8. 8.17² =
  9. 9.11² =
  10. 10.27² =
  11. 11.16² =
  12. 12.12² =
  13. 13.24² =
  14. 14.21² =
  15. 15.25² =
  16. 16.28² =
  17. 17.15² =
  18. 18.23² =
  19. 19.12² =
  20. 20.14² =
  21. 21.29² =
  22. 22.22² =
  23. 23.25² =
  24. 24.25² =
  25. 25.25² =
  26. 26.21² =
  27. 27.24² =
  28. 28.18² =
  29. 29.12² =
  30. 30.18² =
  31. 31.25² =
  32. 32.21² =
  33. 33.23² =
  34. 34.21² =
  35. 35.29² =
  36. 36.13² =
  37. 37.25² =
  38. 38.25² =
  39. 39.26² =
  40. 40.24² =

Answer key

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

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