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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 12 · 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. 1.25² =
  2. 2.11² =
  3. 3.26² =
  4. 4.29² =
  5. 5.24² =
  6. 6.15² =
  7. 7.16² =
  8. 8.21² =
  9. 9.22² =
  10. 10.13² =
  11. 11.14² =
  12. 12.27² =
  13. 13.18² =
  14. 14.23² =
  15. 15.12² =
  16. 16.19² =
  17. 17.17² =
  18. 18.28² =
  19. 19.14² =
  20. 20.16² =
  21. 21.11² =
  22. 22.28² =
  23. 23.23² =
  24. 24.12² =
  25. 25.26² =
  26. 26.14² =
  27. 27.15² =
  28. 28.14² =
  29. 29.21² =
  30. 30.16² =
  31. 31.24² =
  32. 32.12² =
  33. 33.16² =
  34. 34.13² =
  35. 35.12² =
  36. 36.18² =
  37. 37.29² =
  38. 38.16² =
  39. 39.15² =
  40. 40.29² =

Answer key

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

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