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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 338 · 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. 2.25² =
  3. 3.13² =
  4. 4.23² =
  5. 5.14² =
  6. 6.28² =
  7. 7.22² =
  8. 8.21² =
  9. 9.27² =
  10. 10.17² =
  11. 11.15² =
  12. 12.29² =
  13. 13.16² =
  14. 14.26² =
  15. 15.26² =
  16. 16.19² =
  17. 17.11² =
  18. 18.18² =
  19. 19.16² =
  20. 20.12² =
  21. 21.24² =
  22. 22.11² =
  23. 23.14² =
  24. 24.21² =
  25. 25.16² =
  26. 26.15² =
  27. 27.13² =
  28. 28.25² =
  29. 29.27² =
  30. 30.15² =
  31. 31.27² =
  32. 32.28² =
  33. 33.25² =
  34. 34.27² =
  35. 35.16² =
  36. 36.14² =
  37. 37.26² =
  38. 38.17² =
  39. 39.14² =
  40. 40.23² =

Answer key

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

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