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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 550 · 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. 2.13² =
  3. 3.12² =
  4. 4.24² =
  5. 5.18² =
  6. 6.17² =
  7. 7.15² =
  8. 8.21² =
  9. 9.19² =
  10. 10.14² =
  11. 11.26² =
  12. 12.25² =
  13. 13.27² =
  14. 14.23² =
  15. 15.11² =
  16. 16.22² =
  17. 17.21² =
  18. 18.28² =
  19. 19.15² =
  20. 20.16² =
  21. 21.23² =
  22. 22.16² =
  23. 23.29² =
  24. 24.14² =
  25. 25.17² =
  26. 26.17² =
  27. 27.17² =
  28. 28.18² =
  29. 29.19² =
  30. 30.21² =
  31. 31.29² =
  32. 32.24² =
  33. 33.17² =
  34. 34.25² =
  35. 35.22² =
  36. 36.16² =
  37. 37.13² =
  38. 38.17² =
  39. 39.17² =
  40. 40.23² =

Answer key

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

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