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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 494 · 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. 1.28² =
  2. 2.26² =
  3. 3.24² =
  4. 4.16² =
  5. 5.13² =
  6. 6.23² =
  7. 7.15² =
  8. 8.19² =
  9. 9.12² =
  10. 10.11² =
  11. 11.29² =
  12. 12.18² =
  13. 13.21² =
  14. 14.22² =
  15. 15.14² =
  16. 16.27² =
  17. 17.22² =
  18. 18.17² =
  19. 19.28² =
  20. 20.27² =
  21. 21.12² =
  22. 22.25² =
  23. 23.15² =
  24. 24.15² =
  25. 25.12² =
  26. 26.13² =
  27. 27.16² =
  28. 28.24² =
  29. 29.27² =
  30. 30.22² =
  31. 31.17² =
  32. 32.24² =
  33. 33.14² =
  34. 34.14² =
  35. 35.11² =
  36. 36.25² =
  37. 37.15² =
  38. 38.12² =
  39. 39.14² =
  40. 40.15² =

Answer key

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

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