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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 290 · 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. 2.19² =
  3. 3.11² =
  4. 4.27² =
  5. 5.14² =
  6. 6.12² =
  7. 7.22² =
  8. 8.13² =
  9. 9.24² =
  10. 10.26² =
  11. 11.25² =
  12. 12.21² =
  13. 13.16² =
  14. 14.17² =
  15. 15.23² =
  16. 16.12² =
  17. 17.15² =
  18. 18.28² =
  19. 19.29² =
  20. 20.11² =
  21. 21.16² =
  22. 22.21² =
  23. 23.26² =
  24. 24.21² =
  25. 25.12² =
  26. 26.13² =
  27. 27.27² =
  28. 28.19² =
  29. 29.27² =
  30. 30.11² =
  31. 31.26² =
  32. 32.17² =
  33. 33.12² =
  34. 34.15² =
  35. 35.28² =
  36. 36.14² =
  37. 37.15² =
  38. 38.15² =
  39. 39.19² =
  40. 40.24² =

Answer key

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

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