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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 537 · 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. 1.19² =
  2. 2.28² =
  3. 3.21² =
  4. 4.18² =
  5. 5.15² =
  6. 6.26² =
  7. 7.12² =
  8. 8.17² =
  9. 9.25² =
  10. 10.11² =
  11. 11.16² =
  12. 12.29² =
  13. 13.14² =
  14. 14.24² =
  15. 15.27² =
  16. 16.13² =
  17. 17.23² =
  18. 18.22² =
  19. 19.25² =
  20. 20.24² =
  21. 21.16² =
  22. 22.26² =
  23. 23.22² =
  24. 24.26² =
  25. 25.26² =
  26. 26.26² =
  27. 27.19² =
  28. 28.14² =
  29. 29.16² =
  30. 30.26² =
  31. 31.15² =
  32. 32.19² =
  33. 33.28² =
  34. 34.18² =
  35. 35.24² =
  36. 36.17² =
  37. 37.11² =
  38. 38.18² =
  39. 39.26² =
  40. 40.16² =

Answer key

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

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