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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 128 · 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. 1.21² =
  2. 2.13² =
  3. 3.16² =
  4. 4.24² =
  5. 5.12² =
  6. 6.28² =
  7. 7.11² =
  8. 8.14² =
  9. 9.15² =
  10. 10.22² =
  11. 11.27² =
  12. 12.19² =
  13. 13.29² =
  14. 14.23² =
  15. 15.25² =
  16. 16.17² =
  17. 17.26² =
  18. 18.19² =
  19. 19.18² =
  20. 20.16² =
  21. 21.19² =
  22. 22.12² =
  23. 23.21² =
  24. 24.11² =
  25. 25.17² =
  26. 26.21² =
  27. 27.28² =
  28. 28.11² =
  29. 29.24² =
  30. 30.21² =
  31. 31.22² =
  32. 32.18² =
  33. 33.26² =
  34. 34.22² =
  35. 35.28² =
  36. 36.29² =
  37. 37.23² =
  38. 38.15² =
  39. 39.16² =
  40. 40.22² =

Answer key

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

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