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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 757 · 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. 1.22² =
  2. 2.25² =
  3. 3.21² =
  4. 4.11² =
  5. 5.12² =
  6. 6.13² =
  7. 7.18² =
  8. 8.29² =
  9. 9.14² =
  10. 10.19² =
  11. 11.15² =
  12. 12.28² =
  13. 13.16² =
  14. 14.26² =
  15. 15.17² =
  16. 16.27² =
  17. 17.23² =
  18. 18.24² =
  19. 19.21² =
  20. 20.12² =
  21. 21.29² =
  22. 22.22² =
  23. 23.19² =
  24. 24.26² =
  25. 25.11² =
  26. 26.24² =
  27. 27.29² =
  28. 28.12² =
  29. 29.21² =
  30. 30.21² =
  31. 31.13² =
  32. 32.17² =
  33. 33.28² =
  34. 34.22² =
  35. 35.23² =
  36. 36.13² =
  37. 37.13² =
  38. 38.19² =
  39. 39.26² =
  40. 40.17² =

Answer key

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

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