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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 325 · 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. 1.17² =
  2. 2.14² =
  3. 3.16² =
  4. 4.23² =
  5. 5.12² =
  6. 6.27² =
  7. 7.24² =
  8. 8.11² =
  9. 9.18² =
  10. 10.21² =
  11. 11.29² =
  12. 12.19² =
  13. 13.13² =
  14. 14.28² =
  15. 15.25² =
  16. 16.15² =
  17. 17.22² =
  18. 18.26² =
  19. 19.18² =
  20. 20.12² =
  21. 21.29² =
  22. 22.19² =
  23. 23.27² =
  24. 24.23² =
  25. 25.25² =
  26. 26.13² =
  27. 27.28² =
  28. 28.21² =
  29. 29.12² =
  30. 30.13² =
  31. 31.29² =
  32. 32.24² =
  33. 33.26² =
  34. 34.24² =
  35. 35.21² =
  36. 36.29² =
  37. 37.19² =
  38. 38.19² =
  39. 39.13² =
  40. 40.26² =

Answer key

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

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