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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 276 · 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. 1.21² =
  2. 2.13² =
  3. 3.23² =
  4. 4.22² =
  5. 5.17² =
  6. 6.16² =
  7. 7.28² =
  8. 8.25² =
  9. 9.27² =
  10. 10.14² =
  11. 11.26² =
  12. 12.19² =
  13. 13.29² =
  14. 14.15² =
  15. 15.18² =
  16. 16.12² =
  17. 17.24² =
  18. 18.11² =
  19. 19.19² =
  20. 20.22² =
  21. 21.16² =
  22. 22.22² =
  23. 23.24² =
  24. 24.13² =
  25. 25.26² =
  26. 26.18² =
  27. 27.22² =
  28. 28.23² =
  29. 29.26² =
  30. 30.16² =
  31. 31.28² =
  32. 32.21² =
  33. 33.15² =
  34. 34.19² =
  35. 35.17² =
  36. 36.25² =
  37. 37.24² =
  38. 38.15² =
  39. 39.25² =
  40. 40.16² =

Answer key

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

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