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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 144 · 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. 1.18² =
  2. 2.24² =
  3. 3.22² =
  4. 4.28² =
  5. 5.23² =
  6. 6.12² =
  7. 7.29² =
  8. 8.21² =
  9. 9.14² =
  10. 10.15² =
  11. 11.11² =
  12. 12.19² =
  13. 13.27² =
  14. 14.25² =
  15. 15.26² =
  16. 16.25² =
  17. 17.13² =
  18. 18.17² =
  19. 19.22² =
  20. 20.24² =
  21. 21.16² =
  22. 22.23² =
  23. 23.28² =
  24. 24.28² =
  25. 25.15² =
  26. 26.25² =
  27. 27.13² =
  28. 28.15² =
  29. 29.15² =
  30. 30.29² =
  31. 31.15² =
  32. 32.11² =
  33. 33.22² =
  34. 34.25² =
  35. 35.18² =
  36. 36.14² =
  37. 37.27² =
  38. 38.27² =
  39. 39.21² =
  40. 40.14² =

Answer key

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

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