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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 640 · 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. 2.15² =
  3. 3.14² =
  4. 4.29² =
  5. 5.23² =
  6. 6.18² =
  7. 7.26² =
  8. 8.21² =
  9. 9.25² =
  10. 10.17² =
  11. 11.28² =
  12. 12.27² =
  13. 13.13² =
  14. 14.11² =
  15. 15.16² =
  16. 16.21² =
  17. 17.19² =
  18. 18.24² =
  19. 19.26² =
  20. 20.22² =
  21. 21.23² =
  22. 22.12² =
  23. 23.24² =
  24. 24.28² =
  25. 25.12² =
  26. 26.21² =
  27. 27.16² =
  28. 28.12² =
  29. 29.17² =
  30. 30.28² =
  31. 31.14² =
  32. 32.17² =
  33. 33.12² =
  34. 34.27² =
  35. 35.29² =
  36. 36.11² =
  37. 37.15² =
  38. 38.29² =
  39. 39.26² =
  40. 40.16² =

Answer key

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

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