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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 369 · 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. 2.19² =
  3. 3.25² =
  4. 4.15² =
  5. 5.27² =
  6. 6.22² =
  7. 7.16² =
  8. 8.21² =
  9. 9.26² =
  10. 10.24² =
  11. 11.14² =
  12. 12.11² =
  13. 13.17² =
  14. 14.18² =
  15. 15.12² =
  16. 16.13² =
  17. 17.23² =
  18. 18.23² =
  19. 19.11² =
  20. 20.27² =
  21. 21.28² =
  22. 22.21² =
  23. 23.25² =
  24. 24.16² =
  25. 25.12² =
  26. 26.18² =
  27. 27.16² =
  28. 28.24² =
  29. 29.29² =
  30. 30.13² =
  31. 31.19² =
  32. 32.21² =
  33. 33.16² =
  34. 34.21² =
  35. 35.25² =
  36. 36.26² =
  37. 37.21² =
  38. 38.23² =
  39. 39.15² =
  40. 40.21² =

Answer key

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

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