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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 524 · 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. 3.18² =
  4. 4.28² =
  5. 5.14² =
  6. 6.13² =
  7. 7.19² =
  8. 8.29² =
  9. 9.15² =
  10. 10.23² =
  11. 11.12² =
  12. 12.27² =
  13. 13.22² =
  14. 14.26² =
  15. 15.25² =
  16. 16.24² =
  17. 17.26² =
  18. 18.21² =
  19. 19.17² =
  20. 20.25² =
  21. 21.18² =
  22. 22.25² =
  23. 23.29² =
  24. 24.22² =
  25. 25.22² =
  26. 26.28² =
  27. 27.26² =
  28. 28.26² =
  29. 29.22² =
  30. 30.19² =
  31. 31.16² =
  32. 32.17² =
  33. 33.24² =
  34. 34.11² =
  35. 35.18² =
  36. 36.15² =
  37. 37.16² =
  38. 38.25² =
  39. 39.17² =
  40. 40.16² =

Answer key

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

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