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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 538 · 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. 2.27² =
  3. 3.28² =
  4. 4.17² =
  5. 5.21² =
  6. 6.26² =
  7. 7.15² =
  8. 8.16² =
  9. 9.25² =
  10. 10.18² =
  11. 11.14² =
  12. 12.29² =
  13. 13.13² =
  14. 14.24² =
  15. 15.12² =
  16. 16.22² =
  17. 17.21² =
  18. 18.19² =
  19. 19.16² =
  20. 20.23² =
  21. 21.19² =
  22. 22.12² =
  23. 23.19² =
  24. 24.25² =
  25. 25.15² =
  26. 26.16² =
  27. 27.11² =
  28. 28.13² =
  29. 29.22² =
  30. 30.12² =
  31. 31.23² =
  32. 32.11² =
  33. 33.17² =
  34. 34.13² =
  35. 35.21² =
  36. 36.29² =
  37. 37.21² =
  38. 38.18² =
  39. 39.12² =
  40. 40.16² =

Answer key

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

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