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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 619 · 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. 1.28² =
  2. 2.13² =
  3. 3.18² =
  4. 4.23² =
  5. 5.24² =
  6. 6.27² =
  7. 7.15² =
  8. 8.17² =
  9. 9.11² =
  10. 10.22² =
  11. 11.21² =
  12. 12.26² =
  13. 13.29² =
  14. 14.12² =
  15. 15.16² =
  16. 16.25² =
  17. 17.19² =
  18. 18.14² =
  19. 19.24² =
  20. 20.29² =
  21. 21.11² =
  22. 22.21² =
  23. 23.15² =
  24. 24.16² =
  25. 25.15² =
  26. 26.11² =
  27. 27.23² =
  28. 28.23² =
  29. 29.28² =
  30. 30.26² =
  31. 31.18² =
  32. 32.13² =
  33. 33.22² =
  34. 34.11² =
  35. 35.18² =
  36. 36.14² =
  37. 37.17² =
  38. 38.24² =
  39. 39.21² =
  40. 40.26² =

Answer key

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

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