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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 709 · 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. 2.21² =
  3. 3.17² =
  4. 4.28² =
  5. 5.23² =
  6. 6.11² =
  7. 7.25² =
  8. 8.12² =
  9. 9.16² =
  10. 10.24² =
  11. 11.29² =
  12. 12.22² =
  13. 13.13² =
  14. 14.27² =
  15. 15.18² =
  16. 16.26² =
  17. 17.15² =
  18. 18.15² =
  19. 19.14² =
  20. 20.26² =
  21. 21.26² =
  22. 22.22² =
  23. 23.23² =
  24. 24.23² =
  25. 25.12² =
  26. 26.27² =
  27. 27.26² =
  28. 28.19² =
  29. 29.16² =
  30. 30.15² =
  31. 31.21² =
  32. 32.28² =
  33. 33.23² =
  34. 34.12² =
  35. 35.17² =
  36. 36.29² =
  37. 37.18² =
  38. 38.16² =
  39. 39.25² =
  40. 40.21² =

Answer key

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

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