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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 200 · 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. 1.11² =
  2. 2.16² =
  3. 3.13² =
  4. 4.19² =
  5. 5.21² =
  6. 6.25² =
  7. 7.28² =
  8. 8.23² =
  9. 9.29² =
  10. 10.15² =
  11. 11.12² =
  12. 12.18² =
  13. 13.14² =
  14. 14.24² =
  15. 15.26² =
  16. 16.22² =
  17. 17.17² =
  18. 18.28² =
  19. 19.25² =
  20. 20.27² =
  21. 21.11² =
  22. 22.11² =
  23. 23.19² =
  24. 24.26² =
  25. 25.21² =
  26. 26.26² =
  27. 27.19² =
  28. 28.15² =
  29. 29.18² =
  30. 30.25² =
  31. 31.29² =
  32. 32.12² =
  33. 33.27² =
  34. 34.11² =
  35. 35.14² =
  36. 36.22² =
  37. 37.29² =
  38. 38.23² =
  39. 39.15² =
  40. 40.19² =

Answer key

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

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