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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 466 · 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. 1.14² =
  2. 2.21² =
  3. 3.11² =
  4. 4.25² =
  5. 5.12² =
  6. 6.26² =
  7. 7.13² =
  8. 8.19² =
  9. 9.22² =
  10. 10.28² =
  11. 11.27² =
  12. 12.18² =
  13. 13.15² =
  14. 14.23² =
  15. 15.29² =
  16. 16.17² =
  17. 17.27² =
  18. 18.23² =
  19. 19.16² =
  20. 20.24² =
  21. 21.27² =
  22. 22.22² =
  23. 23.19² =
  24. 24.26² =
  25. 25.15² =
  26. 26.29² =
  27. 27.22² =
  28. 28.25² =
  29. 29.11² =
  30. 30.12² =
  31. 31.15² =
  32. 32.28² =
  33. 33.14² =
  34. 34.24² =
  35. 35.28² =
  36. 36.16² =
  37. 37.14² =
  38. 38.26² =
  39. 39.14² =
  40. 40.16² =

Answer key

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

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