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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 677 · 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. 1.12² =
  2. 2.18² =
  3. 3.21² =
  4. 4.16² =
  5. 5.24² =
  6. 6.25² =
  7. 7.17² =
  8. 8.23² =
  9. 9.26² =
  10. 10.29² =
  11. 11.19² =
  12. 12.28² =
  13. 13.13² =
  14. 14.14² =
  15. 15.22² =
  16. 16.13² =
  17. 17.23² =
  18. 18.23² =
  19. 19.15² =
  20. 20.27² =
  21. 21.27² =
  22. 22.16² =
  23. 23.21² =
  24. 24.11² =
  25. 25.15² =
  26. 26.21² =
  27. 27.23² =
  28. 28.26² =
  29. 29.14² =
  30. 30.24² =
  31. 31.14² =
  32. 32.13² =
  33. 33.14² =
  34. 34.26² =
  35. 35.26² =
  36. 36.16² =
  37. 37.21² =
  38. 38.22² =
  39. 39.13² =
  40. 40.15² =

Answer key

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

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