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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 13 · 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. 1.25² =
  2. 2.21² =
  3. 3.23² =
  4. 4.27² =
  5. 5.19² =
  6. 6.11² =
  7. 7.16² =
  8. 8.22² =
  9. 9.15² =
  10. 10.14² =
  11. 11.29² =
  12. 12.13² =
  13. 13.26² =
  14. 14.24² =
  15. 15.12² =
  16. 16.17² =
  17. 17.18² =
  18. 18.21² =
  19. 19.29² =
  20. 20.28² =
  21. 21.11² =
  22. 22.24² =
  23. 23.14² =
  24. 24.26² =
  25. 25.23² =
  26. 26.14² =
  27. 27.12² =
  28. 28.12² =
  29. 29.24² =
  30. 30.26² =
  31. 31.11² =
  32. 32.24² =
  33. 33.16² =
  34. 34.12² =
  35. 35.24² =
  36. 36.16² =
  37. 37.26² =
  38. 38.12² =
  39. 39.14² =
  40. 40.23² =

Answer key

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

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