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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 844 · 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. 1.29² =
  2. 2.17² =
  3. 3.16² =
  4. 4.27² =
  5. 5.22² =
  6. 6.12² =
  7. 7.14² =
  8. 8.26² =
  9. 9.25² =
  10. 10.21² =
  11. 11.13² =
  12. 12.28² =
  13. 13.24² =
  14. 14.15² =
  15. 15.11² =
  16. 16.23² =
  17. 17.19² =
  18. 18.12² =
  19. 19.18² =
  20. 20.16² =
  21. 21.13² =
  22. 22.24² =
  23. 23.19² =
  24. 24.17² =
  25. 25.19² =
  26. 26.22² =
  27. 27.25² =
  28. 28.25² =
  29. 29.29² =
  30. 30.25² =
  31. 31.12² =
  32. 32.12² =
  33. 33.24² =
  34. 34.28² =
  35. 35.12² =
  36. 36.16² =
  37. 37.21² =
  38. 38.26² =
  39. 39.12² =
  40. 40.14² =

Answer key

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

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