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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 69 · 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. 2.12² =
  3. 3.21² =
  4. 4.19² =
  5. 5.15² =
  6. 6.11² =
  7. 7.17² =
  8. 8.16² =
  9. 9.13² =
  10. 10.27² =
  11. 11.23² =
  12. 12.18² =
  13. 13.29² =
  14. 14.22² =
  15. 15.24² =
  16. 16.26² =
  17. 17.13² =
  18. 18.14² =
  19. 19.11² =
  20. 20.14² =
  21. 21.25² =
  22. 22.22² =
  23. 23.14² =
  24. 24.24² =
  25. 25.12² =
  26. 26.17² =
  27. 27.28² =
  28. 28.29² =
  29. 29.19² =
  30. 30.16² =
  31. 31.12² =
  32. 32.12² =
  33. 33.14² =
  34. 34.21² =
  35. 35.25² =
  36. 36.19² =
  37. 37.17² =
  38. 38.22² =
  39. 39.11² =
  40. 40.18² =

Answer key

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

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