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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 24 · 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. 1.16² =
  2. 2.21² =
  3. 3.19² =
  4. 4.26² =
  5. 5.22² =
  6. 6.12² =
  7. 7.11² =
  8. 8.15² =
  9. 9.25² =
  10. 10.29² =
  11. 11.24² =
  12. 12.14² =
  13. 13.13² =
  14. 14.28² =
  15. 15.17² =
  16. 16.18² =
  17. 17.27² =
  18. 18.14² =
  19. 19.13² =
  20. 20.23² =
  21. 21.24² =
  22. 22.26² =
  23. 23.15² =
  24. 24.16² =
  25. 25.21² =
  26. 26.14² =
  27. 27.28² =
  28. 28.29² =
  29. 29.16² =
  30. 30.12² =
  31. 31.15² =
  32. 32.24² =
  33. 33.21² =
  34. 34.21² =
  35. 35.22² =
  36. 36.13² =
  37. 37.22² =
  38. 38.27² =
  39. 39.17² =
  40. 40.18² =

Answer key

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

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