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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 447 · 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. 1.23² =
  2. 2.24² =
  3. 3.19² =
  4. 4.12² =
  5. 5.15² =
  6. 6.22² =
  7. 7.16² =
  8. 8.13² =
  9. 9.21² =
  10. 10.25² =
  11. 11.28² =
  12. 12.29² =
  13. 13.11² =
  14. 14.18² =
  15. 15.27² =
  16. 16.26² =
  17. 17.17² =
  18. 18.14² =
  19. 19.21² =
  20. 20.13² =
  21. 21.11² =
  22. 22.19² =
  23. 23.16² =
  24. 24.21² =
  25. 25.17² =
  26. 26.17² =
  27. 27.15² =
  28. 28.22² =
  29. 29.14² =
  30. 30.23² =
  31. 31.12² =
  32. 32.26² =
  33. 33.15² =
  34. 34.16² =
  35. 35.24² =
  36. 36.15² =
  37. 37.27² =
  38. 38.13² =
  39. 39.14² =
  40. 40.22² =

Answer key

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

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