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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 840 · 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. 1.29² =
  2. 2.22² =
  3. 3.25² =
  4. 4.17² =
  5. 5.15² =
  6. 6.18² =
  7. 7.19² =
  8. 8.14² =
  9. 9.28² =
  10. 10.26² =
  11. 11.16² =
  12. 12.11² =
  13. 13.21² =
  14. 14.13² =
  15. 15.27² =
  16. 16.12² =
  17. 17.23² =
  18. 18.24² =
  19. 19.26² =
  20. 20.25² =
  21. 21.15² =
  22. 22.24² =
  23. 23.23² =
  24. 24.17² =
  25. 25.16² =
  26. 26.26² =
  27. 27.24² =
  28. 28.16² =
  29. 29.12² =
  30. 30.18² =
  31. 31.21² =
  32. 32.12² =
  33. 33.26² =
  34. 34.15² =
  35. 35.22² =
  36. 36.28² =
  37. 37.26² =
  38. 38.12² =
  39. 39.16² =
  40. 40.17² =

Answer key

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

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