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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 543 · 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. 1.15² =
  2. 2.28² =
  3. 3.11² =
  4. 4.26² =
  5. 5.23² =
  6. 6.27² =
  7. 7.12² =
  8. 8.16² =
  9. 9.14² =
  10. 10.22² =
  11. 11.13² =
  12. 12.18² =
  13. 13.19² =
  14. 14.28² =
  15. 15.21² =
  16. 16.17² =
  17. 17.29² =
  18. 18.25² =
  19. 19.24² =
  20. 20.15² =
  21. 21.27² =
  22. 22.25² =
  23. 23.16² =
  24. 24.17² =
  25. 25.17² =
  26. 26.12² =
  27. 27.21² =
  28. 28.16² =
  29. 29.15² =
  30. 30.15² =
  31. 31.27² =
  32. 32.23² =
  33. 33.24² =
  34. 34.26² =
  35. 35.24² =
  36. 36.24² =
  37. 37.15² =
  38. 38.22² =
  39. 39.29² =
  40. 40.15² =

Answer key

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

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