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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 771 · 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. 1.21² =
  2. 2.25² =
  3. 3.15² =
  4. 4.29² =
  5. 5.24² =
  6. 6.27² =
  7. 7.22² =
  8. 8.12² =
  9. 9.28² =
  10. 10.13² =
  11. 11.18² =
  12. 12.16² =
  13. 13.19² =
  14. 14.26² =
  15. 15.14² =
  16. 16.13² =
  17. 17.23² =
  18. 18.17² =
  19. 19.11² =
  20. 20.13² =
  21. 21.22² =
  22. 22.29² =
  23. 23.16² =
  24. 24.17² =
  25. 25.17² =
  26. 26.14² =
  27. 27.19² =
  28. 28.12² =
  29. 29.12² =
  30. 30.13² =
  31. 31.15² =
  32. 32.29² =
  33. 33.12² =
  34. 34.21² =
  35. 35.11² =
  36. 36.16² =
  37. 37.11² =
  38. 38.15² =
  39. 39.17² =
  40. 40.23² =

Answer key

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

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