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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 656 · 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. 1.13² =
  2. 2.16² =
  3. 3.21² =
  4. 4.19² =
  5. 5.15² =
  6. 6.27² =
  7. 7.12² =
  8. 8.24² =
  9. 9.26² =
  10. 10.25² =
  11. 11.23² =
  12. 12.14² =
  13. 13.22² =
  14. 14.17² =
  15. 15.18² =
  16. 16.11² =
  17. 17.28² =
  18. 18.14² =
  19. 19.28² =
  20. 20.29² =
  21. 21.15² =
  22. 22.11² =
  23. 23.13² =
  24. 24.12² =
  25. 25.27² =
  26. 26.21² =
  27. 27.29² =
  28. 28.21² =
  29. 29.25² =
  30. 30.27² =
  31. 31.24² =
  32. 32.26² =
  33. 33.16² =
  34. 34.26² =
  35. 35.21² =
  36. 36.26² =
  37. 37.23² =
  38. 38.17² =
  39. 39.12² =
  40. 40.23² =

Answer key

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

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